I'm sorry you are having a difficult time.
Kimmy, I'm on Xanax too. When I did a cold turkey before I had really bad chest pains. The doctors checked it out to make sure my heart was ok. They then did an x-ray and said I had costochondritis, an inflammation of the breast bone and/or ribs, caused by either too heavy of lifting or heavy emotions.
It went away after several weeks.
I also have the tingling in my hands and feet. I think that is common symptom for benzo people, especially when you are tapering or in tolerance or inter-dose withdrawal.
Since you have had Lyme's disease too, it's always safe to check everything with your doctor.
Welcome to BB.