I think tapering the Xanax could be playing a part in how you are feeling, the symptoms match benzo withdrawal. The stress of the last 5 months could be catching up with you too. I would definitely keep withdrawing off the Xanax and try and do some exercise, walking to start with to get your circulation better and wake up your endorphins. Deep breathing exercises, meditation, listening to music help me calm down. Most of all be kind to yourself, you've come along way and I feel sure once you're med free you'll feel confident again, but it could take a couple more months so hang in there!