Hi, I am 22. I am not overweight nor to skinny. Eat rather healthy and try to exercise from time to time. Never had heart or chest problems before. All of a sudden I started having sharp stabbing pain in my chest where the heart is, so only on one side, when ever i would laugh or take a deeper breath. Then it went away after a couple of hours. The next day it came back with even sharper pain and more often then went away again. The third day the sharp stabbing pain came back, I have a at home blood pressure kit and my blood pressure was very high with something like 170/ 130 and showed i have a irregular heart beat. I checked this again on a different system and showed the same results. Now i also have a have to take deep breaths and it feels like my throat is swollen and uncomfortable. What could this possibly be? I have to insurance so that is the reason i haven t went to the doctor The reason I didnt take it that seriously is because I thought that maybe its nothing big and is something common like heartburn, which I never had before so I don t know how it feels. Also i have z cold sore and look Valtrex 500 mg, so i though that maybe it was just a side affect of it, even though i have taken it before many times.