So I am 18 years old, and last week I started experiencing some arm pain and a bit of shoulder pain. It went up to my neck and I really had no idea what it was. When I originally started experiencing left arm pain, well not really pain just kind of discomfort, I looked it up. Bad idea. That only made it worse for me. I usually manage my anxiety really well and do not let it control me, but since this happened I kept believing that it was a heart problem. I always need to mention that I tend to do the same motion a lot at my job, and injured my finger on my right hand near the beginning of December, making it easier to just use my left hand for things. I believe that the issue is that I sort of overworked my left shoulder and that is what is causing the soreness and discomfort. There is a bit of pins and needles as well. Last week I was completely paranoid that it was a heart issue, and had tons of trouble sleeping. I went to my GP, who took my blood pressure and pulse. I had gotten almost no sleep before this measurement and was super stressed, and my pulse was 81 with a 132/80 BP. For me, an 81 pulse is a bit high for resting, considering I run almost everyday and go to the gym 6 times a week. Yesterday I took my blood pressure and pulse again, with a cuff at home, and I had a resting pulse of 56 and a BP of 120/73. The problem I have is that sometimes after working out I feel my heartbeat a lot and overthink about it. On top of this, I have some muscle spasms (or so I think) and they sometimes make me jump because I think it’s my heart. When working out I don’t feel any more lightheaded, and I don’t feel any chest pain. I just want to get back to being able to not overthink my heart beats.