Withdrawal Side Effects - Notify Doctor:

More common: Irritability; nervousness; trouble in sleeping

Less common: Abdominal or stomach cramps; confusion; fast or pounding heartbeat; increased sense of hearing; increased sensitivity to touch and pain; increased sweating; loss of sense of reality; mental depression; muscle cramps; nausea or vomiting; sensitivity of eyes to light; tingling, burning, or prickly sensations; trembling or shaking

Rare: Confusion as to time, place, or person; convulsions (seizures); feelings of suspicion or distrust; hallucinations (seeing, hearing, or feeling things that are not there)

From: http://bipolar.about.com/cs/sfx/a/sfx_xanax.htm

Sounds like such a pleasant drug! Good luck, freewill, hope the worst is behind you