well, i did anxiety crisis 5-6 years ago.
it all started one morning i had an exam.
i didn't sleep and i did my 1st anxiety crisis that morning, threatened, i didn't understand nothing.i didn't understand what was going on.
i couldn't normally breath and i had huge stomach pains. in fact, it was caused by the general tension. i couldn't eat as i should for months. of course, i lost a lot of weigt. i just couldn't eat nutritive stuff like pasta, potatoes, meat,...i could only eat yogurts and cereal bars
i did a deep depression, with impressive anxiety crisis.
my parents made me to see a doctor. he told me i was doing a deep depression, with a real huge anxiety problem.
i took medicine (Xanax at the beginning, then i took Lexomil, anti depressor stuff and somnifers) and i did a psychotherapy...for 1 year and a half, which is a long time when you're 20.
one day i decided i had to stop all these pills, and i though i didn't need a psy anymore. i got well that day.now it's ok, i know how to react when i feel too anxious.
i think your doctor was right. but, hey, i'm not a doctor!!