Hello and welcome.
When I was at my heaviest part of my drinking years, I would experience terrible thoughts and impending doom. This was beyond anxiety. It was sweating it out and try and stay sane memories or flashbacks.
Extremely uncomfortable.
Some times not even a drink would take them away. Other times I was afraid to take a drink. Once I hid in a closet it was so bad.
Weird and scary. So I can relate a little.
After a few very uncomfortable days, I felt better. Then, of course, right back to the bottle.
With sobriety now, these feelings have been gone for a long time. I wish the same for you.