comingoutsober, I don't have any experience with Antabuse, but I have been prescribed meds for anxiety. In my experience, the racing thoughts and anxiety were always worst after a night of heavy drinking. In the few months that I have been sober, my anxiety issues have dramatically improved. You may find the same to be true, especially if you can get string together more sober days.
It also seems to me that you are standing at the edge of a big hole and the ground is giving way around you. You know that if you do nothing, or keep doing what you are doing, the outcome will not be good. You can wait until you slide into the hole and see if you are still able to crawl your way out.
Or you can step back from the hole.
Good luck. I am pulling for you.