I m female, 14, asian. Healthy, I guess I can run a mile without stopping. The past few weeks, I have this pressure on my chest . Like a muscle s flexing the unflexing really fast. I m really tired, I feel sort of sick. I have a really bad cold, and I sneeze more than 12 times in an hour. My pulse would be fast one second, then slow the next and I m just sitting down reading. Then, there s also pressure on the left side just right above the ribs. Sometimes I start to feel it in my arms, then on my back. I have no idea if this is all related, but I have been extremely healthy for the past 14 years, evre since I was born. I don t want to tell my parents just in case its nothing. Usually, when this happens, it passes by within a week. This one, I can t ignore. Oh, and I can feel my pulse on the left side above the rib just standing or sitting still without touching it, and I can feel the pulse in my ear. Anyone? please? I m not exagerrating anything.