Re: Not sure what to do next
kat is right, that's a hefty dose of Xanax, and you become adapted to that drug and almost inevitably have to increase it.
It has a very difficult withdrawal.
He may be going into withdrawal from the week, I think, and need some professional help in doing that. A good pdoc is necessary, from what you say, both to ease him through the withdrawal and get that Xanax down, too.
I know he's afraid of that, but he can be on other, more effective medications, better in the long run. I guess you can go with him, be there to talk to, and watch for physical signs of withdrawal - and be sure he doesn't compensate for the week in destructive ways. In the end, though, it's better is he finds professional help and support outside your relationship, like a support group.
Just my thoughts, hope it helps.