Well, to be honest, from what I've read and experienced, anxiety can cause or amplify almost any physical symptom. Some of the ones I experienced were:
what I think are called "brain zaps"
social anxiety/mild agoraphobia
plain old negative thinking
pains in chest, abdomen
crazy bowel movements
inability to tolerate noise and temperature fluctuations in either direction
inability to concentrate
Now and then I'd have a week or so where I would have no panic attacks, but generally I experienced them every day. Usually several times a day. Nausea and bloating were my panic attack symptoms, which is a little unusual. The other symptoms I listed occurred with less frequency, or I was simply too overwhelmed with nausea to notice them as much.
It's a strange condition to have, but it can be treated and you can get better.
My Brain: My friend, My enemy: A blog to chronicle my attempt to recover from anxiety/panic disorderanxietypanicdisorder.blogspot.com/