I'm 16yo, and was having left sided chest pains and left arm pain, and sometimes even neck pain. The pain was not severe, but enough to be noticeable. At times it was a sharp pain, but at most times it was a dull ache that lasted anywhere from a few seconds to a minute or two. I was at most times able to pinpoint where the pain was. I went to a hospital after about a week of having the issues. They performed an EKG, did blood work, used a stethoscope and a blood pressure test. Everything came back fine and it eased me of my stress. About 2 weeks later I began to notice it again. I tried to calm myself down by saying "I've already been to the hospital I'm fine" but it never helped. Another week went past and I was not having it, so I went back to the hospital with the same complaint. Worrying about it made it more sore at times. I went through the same procedure with all the tests, and everything came back fine. They said they do not know an accurate cause of the pain, but it should go away soon. They also told me not to worry about and try to forget the pain is there. Its been about 2 weeks since my last hospital visit and the left sided issues are still here and it is bugging me. In total, the issue has seemed to be there for about a month and a half and in-between those months it would sometimes go away, but eventually come back. All I do these days is check my pulse every so often and sometimes I just lie down to see if I notice anything. Do you guys think I am overreacting and I am scaring myself or should I go for another checkup?