Awww so sorry. Yep, detox sucks!!!
I know you are scared to try other meds. I was too, as a bunch of them made me worse too.....but if it were me choosing between vistaril and gabapentin?.....I would be more willing to try vistiril. Because gabapentin can have a withdrawal very similar to benzos! And vistaril is just basically a strong antihistamine, you can think of it as like a big Benadryl. It could help with sleep and anxiety. The only reason I couldn't take it is the fact that I couldn't take antihistamines BEFORE benzo withdrawal, so I definitely couldn't. So long as you don't have problems with antihistamines,.
Anyway, maybe that helps if you are thinking of trying?