I had dreadful headaches and brain fog the first couple of months after I stopped drinking. I was on a real emotional roller-coaster as well: up, down and every variant of mood in between the two and often within the space of a day! I’m only at 90 days now, but I can tell you that in the last month or so, I’ve felt vastly better, both physically and in terms of overall stability of mood. Having read a good bit here as well as other places, it strikes me that it can take a fair while to level out physically and mentally after stopping drinking: neurologically, alcohol use has a pretty significant impact as much as anything else and you have to be patient and allow your neurotransmitters to reset. You will surely feel better given time and, on that basis, perhaps think carefully about whether you really need the Xanax. Best to you.