does anyone else have this? a few months ago i started having very fast heartbeat,shortness of breath, and the main arteries that run down the side of my throat started to hurt. it finally went away but it terrified me. yes ive been to the dr. about it last wk. he thought it may be due to the pressure that builds up when your heart beats so fast or it could be build up of placque. he didnt order any tests. was wondering if anyone else has had this happen to them? now i worry continually. life is so much fun