Cutting the dose, emgreen, is a good idea--talking to the prescribing doctor even better, maybe, because there are so many options besides Ambien. Anything that made me sick I'd avoid.
I never had hangovers but oh! those blackouts. regretful--90 days is quite remarkable, since you've done it cold turkey, no real support. Do you know that you weren't really self-medicating your depression when you drank? Alcohol isn't an antidepressant--it's a depressant.
I was amazed to discover that doctors are not all knowledgable about alcohol or alcoholism ... MDs or psychiatrists. It's my opinion that alcohols who've just quit drinking often suffer a particular type of depression and doctors who understand depression and alcoholism are better equipped to treat you. It takes a while for our body chemistry to revert to normal after all that drinking (some say a couple years), some meds will act differently.
Since you're feeling so awful (I think you ought to,be feeling better by now) I'd be sure my doctor is quite experienced with treating depression in recovering alcoholics. Within medicine, it is a specialty (or ought to be).
Hey, emgreen. I'm thinking about you.