please help
last night i really thought that i was going to die. i was sitting at a friends house watching tv and all of a sudden i got this strange feeling in my chest and up my throat and i literally could not take a breath...i tried to but no air could come in. it only lasted for a couple seconds and then it passed but it was so terrifying. i was sure that i was going to die. i spent the whole night crying and scared. now i am terrified and feel awful. has this ever happened to anyone else? please please help...