I may be radiating anger

Two people recently told me to "calm down" in one situation each.

One is a friend who frequently tells me what to do and not to do, such as when driving to the cinema or when we replaced my car's wheel.
I don't release anger but it's mostly held inside. He further instructed and insisted on something and I told him that it's ok. He told me to calm down and I told him back to calm down with making a big deal out of small things.
It could be my depression, but I HATE! it when people make a big deal of small things, especially when it's over and over like that friend was doing.
That's why I eventually insisted that he not criticize me over small things because it annoys me.

Another is a pharmacist under whom I work as an assistant, among other pharmacists in each shift. I went to close his register and didn't look at his screen to see he's performing a bill. He told me to hold it and to "calm down". He's a pharmacist I kind of despise because he's driven by anger and I have problems dealing with other people's anger.

What do I do?

Sorry just trying to clarify....are you worried that since two people now have told you to calm down that you may be displaying some type of anger or is it that the words "calm down" get on your nerves?

The former

Reread your original post. There is a degree of anger resonating. If this is what these people were feeling off you at that time then that would explain their reactions.

Consider how both you and they were communicating. Specifically what were the non-verbal communications that would have added context. "Calm down" might have had far less of an impact dependent upon the non-verbal cues.

Now ask yourself of your expectations. What did you expect in those situations and what likely did these individuals expect of you? It sounds to as though these weren't the same. Was it possible though there could have been some common ground? Might there be in future interractions?

I agree, it certainly doesn't sound very friendly or professional. But could context have anything to do with their ultimate message.

What is anger resonating?
Both scenarios were during a job, whether it was replacing a tire or working at the pharmacy. When it comes to working, I prefer to do it on my own without too much instructions.
As for the friend, he'd frequently instruct where to drive, where to park, what to do with the tire. I'd tell him to just let me do the parking, while he'd want me to listen to him. Both in the driving and tire replacement there was hardly eye contact.

As for the pharmacist, he was in the middle of a small bill for himself which I didn't notice. After he told me to "calm down" and instructed to close a different register, I told him tolerantly "all's good" in response to his high temper.
To be honest, I really hate that pharmacist. I have to answer phone calls and give it to a pharmacist if needed. He just doesn't feel like answering and there isn't always a more tolerant pharmacist around. I'm just doing my job.
If the pharmacist keeps up like this, I can slap him in the face with a register. If I could deal with people's anger more easily I wouldn't feel the way I do, but thanks to my father I can't do that.

I have spent much of my life as a very angry person driven by anger even when not actually displaying any, and today I am the one who keeps me reminded to "calm down". For myself, the challenge is to remain aware of my anger and to still always remain civil and respectful with others by not letting it, a mere emotion, determine my actions.

Maybe there is something about the phrase "Calm down"---I know I might hear it as a criticism in some situations, especially if said abruptly as it can feel like a judgement. You say you "hate" the pharmacist and that person may well feel that & be reacting. In one of the places I work, someone posted a note beside the desk saying "Be kinder than necessary. Everyone you meet is fighting some kind of battle.".
Wise words if difficult to adhere to.

It's complicated. When I first saw him I had some sort of attraction to him. He'd do his job and giving me instructions, and at times ask me how I'm doing and even express concern. But there was something suspicious and scary about him. He can shift from warm to cold hot-headed, may I boldly say "crazy". That's why I feared and suspected him.
He'd go disordered at times. He can seem nice, but one day just radically go angry at something which seems a bit out of place.

I sealed my attraction and acted with my suspecting feelings to protect myself and not let him control me, as I have my jobs to do.

While I despise him, I do try to care for him as best as I can, for instance when customers call, I try my best to help them on my own and there was even a time where I wanted to give him the phone, he got irritated as usual, but managed to handle this on my own and told him how I dealt with the customer on my own, nodded to him and he nodded back, to show he need not worry.

And by the way, about my friend, he's been annoying frequently telling me where to park and where to drive and how to do and not to do the tire replacement.
Him telling me to "calm down" is ironic, since he was being irritated by so many minor things.
I admit I was stressed to finish watching the prequel of the film we went to, and driving the car in time to his house and having a lucky opportunity to pick up a credit card from my brother when he was just near my friend's house, fuel the car and go to the cinema, buy the tickets and buy food. While all the way to the cinema, he'd talk about how stressed I look and "calmly" flow-talked about being calm, no pressure, all cool... we literally arrived just in time, right after the commercials. He can take the wheel if he thinks he knows better just because he's "calm" and I'm "stressed", but wait, he has no driver's license to begin with.

Just asking...is it just these two people who have irritated you or do you find yourself angry on a frequent basis? I know one person in my life (who lives with me) that irritates the **** out of me. I'm sure I've radiated anger with her before although I try hard not to. It literally rolls off me in waves if I'm not careful.

I mostly hate myself and my life's outcome, feeling I lack control over my life. That's why I thought of busting away from home. Yes, I'm 22 years old and I want to "run".
But rationally I think of the limited money and the possibility of studying for a Master's degree.
If I go out of home I'll only be able to afford a Bachelor.