I saw an ENT like two months ago about a month into this ordeal. And nothing he said and he's a known ENT around the area. I just can't fathom anxiety making dizzy feeling like this so real.
Actually, anxiety CAN make you feel dizzy. Anxiety can and does cause REAL physical symptoms—it's not just all "in your head." And that's whether or not you "feel anxious." Put some of your expert googling skills to use and research anxiety, how it works, and what it does to your body. When your nervous system is wound up, it will react in unpredictable ways, even if you feel "relaxed." For how long you've been chronically anxious, it's going to take many months of concerted effort of NOT getting yourself wound up before things go back to normal.
I think there are some very real possibilities for your dizziness that don't have to do with a brain tumor. Drinking, first of all, plus Xanax. Xanax itself can cause dizziness. Drinking itself can cause dizziness (and needing to puke). I know on a morning after I've had a couple too many, I'm feeling off all day. Alcohol is also a depressant, so any anxiety you feel generally is only going to be worse after four nights of drinking. But to get drunk two days in a row, pop 1mg of Xanax, eat a lot of heavy food, and THEN feel scared that your puking and "off kilter" feeling is being caused by a brain tumor is a stretch.
VP42, this is really the time that you should be kind yourself. Googling is not a helpful activity. Repeated visits to your doctor is not a helpful activity. Mixing alcohol with Xanax is not a helpful activity. I know how you feel—being with friends and relaxing, especially with booze, can feel great, because it's a time when you actually feel NORMAL, but in hindsight, it just sets you back. Aiming for healthy eating habits, healthy sleep habits, and curbing reassurance-seeking behaviors (googling, doctors, etc) will all take you much further. And I would certainly recommend some kind of professional therapy as well. Sure, these things don't "feel good" in the moment, but learning to tolerate these patches of short-term anxiety in exchange for lasting, long-term mental peace is worth it.