If you hyperventilate you can pass out, but it would be a pretty severe panic attack to cause you to pass out. If your that upset, I would hope you would pull over to the side of the road. Once you pass out your breathing rate will return to normal. You won't die, but I believe she did give you a good group of meds to get you to the point where your anxiety starts to decrease.
Take care of you.
Hi Sarah. I'm glad to hear you're doing better on the Klonopin. I just wanted to say that you may not get the start up side effects with the Klonopin helping to calm you. Celexa is a very successful drug for anxiety. When you start taking it sometimes you feel a bit "wired up" as if you had too much coffee. Stick with it... it goes away like magic after about ten days once your body adjusts. Good luck with it.
I don't post much these days - too busy working and having fun without anxiety ruining everything. I got my life back due to Effexor - been on it nearly two years now (please God don't let it stop working!).