hey all,ive been expierincing the same problems you all have,my heart feels like its pumping 100 miles a minute,my throat seems as if its closing up,hard to breath,i havent gone to the hospital yet,bc i have no insurance,but ive been reading all of your post and it seems like you guys are all fine.im 19 years old,healthy as a whistle play hockey,i have no problems breathing on the ice,it just seems to happen every now and then,if i could get someones second opionion that would be great.