Heart issues or anxiety

I have PTSD and struggle managing my anxiety. I'm not a hypochondriac. I was told at 14 that I had a heart murmur but the doctor who listened to it for only a few minutes told me it was nothing serious. Whenever I have a panic attack, my heart races and it starts to hurt.

My heart is easily excitable and it will start racing for no good reason, if my emotions change suddenly, if I'm a little startled, if I get nervous, if I think about something that would make me nervous, my heart even starts pounding sometimes if I'm about to make a phone call. A few months ago at a fourth of july party, I drank two red bulls and vodka.
That night I had to convince my friend to not take me to the ER because when he felt my heart he thought it was beating way too fast to be healthy or normal. I was scared too, because it was the fastest I've ever felt my heart beat and it was a scary feeling. I didn't even know the heart could beat that fast.

These past few weeks when I lay down, and I move my arm, sometimes it creates a "strain" feeling on my heart muscle. I've also noticed when I lay down sometimes my heart will feel "weird" for a few seconds and then it'll feel normal again. Is this just anxiety or does it sound like I need to get my heart checked out?
Whenever my heart starts to feel odd, I'm always waiting for my left arm to go numb in case its an actual heart attack, which has never happened before. But then I read that women usually don't even get that symptom and it's more of a man's symptom. I've also read that heart disease is the number one cause of death for women across the world, so that kind of freaks me out a little bit.

My grandma had issues with her heart, and my mom has mentioned having heart palpitations before. I'm a 22 yr old female, I feel like I shouldn't even be noticing my heart at this age.

Most likely it is anxiety. The heart is very sensitive to the release of adrenaline by the adrenal glands in times of stress or anxiety. However, it would not hurt to get checked by a doctor.

You are better off getting checked out. I had a very rapid heart beat and the ER dr's kept dismissing me as anxiety - I ended up in heart surgery a few months later. Get checked just to be safe.

I agree about checking into it. Are you taking any anti anxiety medications? Too much stress on the system can create health issues. Might not start as heart health issues, but without treating, I feel better to curb my anxiety between as needed meds, therapy, maintaining a healthy weight and staying physically fit. I often wonder about my maternal lineage and ties to anxiety and physical health.
It's complicated to explain. Gram developed physical illnesses in her 40's. I know what she went through in her 20's and 30's. I digress.
Better to see the doctors for regular check ups. Emotional health doctors matter, too.

What is the fastest rate, in beats per minute approximately?

I have been to the emergency room probably 10 times in 8 years thinking I had a heart attack when in fact it was just a panic attack every time they do an EKG and heart liver enzyme test through blood tests and everything comes out fine think of this panic attacks but still have some valium or xanax on hand for the intense ones and maybe get some good regular medicine which is what I'm about to do for mine because mine(panic attacks) are pretty severe as well

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