I hope this helps. When my depression is bad I am more sensitive. I don't know which drives the other (the sensitivity or the depression) but they're likely connected. You didn't say whether you have a diagnosed mental illness (or if you did, I am sorry I did not see it).

So my first suggestion would be to tell your medical doctor about this. Sometimes people think the only thing physicians can do is diagnose or treat physical ailments like ulcers or broken legs. But a good physician will know that some illnesses have an emotional component.

Since you are a new driver, please consider driving with your husband sitting in the passenger seat. It will give you practice in a safer situation and I believe you will get experience handling the jerk drivers in a safer situation (because you will have an experienced driver sitting next to you).

Consider getting good headphones and listening to soothing music or books on tape or other spoken material while you are waiting in line or walking through a store. I see many people doing this. If you do do this, though, you will also need to adapt to visually scanning your environment because I would not be surprised if snatch and grab crimes against headphone wearers is on the rise.

Mentally tell yourself you're going to think about what you saw or what someone said later. Then, if need be when you get home, use a set amount of time to note down what bothered you. I wouldn't give myself more than 30 minutes a day. Once you have written it down, leave it in the book.

My experience working retail: I'd say about 2 out of a hundred were jerks. In fact, I still remember the two people. But they don't bother me anymore. I recognize them as the anomalies: think of all the other nice people I met in a day. You might try to find a job that matches your interests: if you prefer older people and can only find a fast food job, try to get hours when the older folks come in --our local fast food place is jammed with older people after the churches let out.

You don't always have to be accepting. If someone is blocking the aisle, you can choose to go around or you can say, would you let me pass, please? You're not being a bad person if you choose to ask someone to give you courtesy. You did the right thing in telling the young lady she had snagged your rolling cart, and she did the right thing in giving it back to you.

I'm guessing you were raised to be a polite person no matter what. But you are now living in a faster world. I'd say more people are rude, and maybe they are, but I rarely notice them anymore (constant exposure does seem to help deaden their impact, but I also note I have depression); but I'd also say I have noticed (because I mentally, emotionally, and consciously starting trying to notice) the world is filled with decent people trying to get along. Please reward the ones you encounter with a smile or a friendly look; it's a sort of paying forward I do that has paid me back emotionally 10 fold. Courage! I wish you peace and love.