Ever since my surgery (and a month or two before it) I have had increased stress. I used to be driving along and start feeling like I was going to throw up, which I know was just my nerves. Now when I'm driving, I feel like I can't breathe! I have had trouble with allergies, but I think this is probably my nerves and causing me to hyperventilate. It's very scary. Anyone else have a problem with this?