U R not alone.
Keep on with the Pregabalin even though you feel numb etc.. Depression can cause the body to shut down, it affects everywhere as a defence mechanism. It's not simply in the brain. Anxiety can be eased by appropriate medication, what has your GP prescribed thus far?
How long did U trial each one ? Due to intense nausea initially it was difficult to find an anti-depressant that helped, once I got 1 that worked I've been more or less fine since 1988. Anxiety floors me. Initially the GP gave valium which I used as necessary, usually the night B4 an event that I was able to get out of. For several years I had Propranolol, a betablocka to ease early morning anxiety surges. Now I have a go to emergency anti-anxiety tablet.
I will continue with ADs for ever. Often they don't work suddenly because the brain doesn't get where it is and needs to accept the 'uptake' of the medication to begin healing.
Cortisol hormone can cause sudden anxiety surges. I felt that I would never leave the house but eventually with back up from my husband, GP and psychiatrist, I began to recover.