Sorry you're going through this. I know how frustrating it is to feel you're going backwards instead of progressing, or solving the same problems anew.

Today I was suddenly reminded that I used oral GABA supplements to help with anxiety. Now, there is little research on oral supplements for that purpose, but that doesn't prove they don't work for some. Of course, you have to consider what medications, etc, you may be taking. Just thought I'd pass it on, though. Here are a couple of perhaps relevant links I was looking at this morning, in case you wanted to follow up without doing all that googling:

THE BRAIN FROM TOP TO BOTTOM

GABA

Another good one in relation to anxiety was Rhodiola, an herbal supplement. Harder to find and more expensive. I get the GABA in loose powder and just take a little under the tongue.

May be totally irrelevant for you, but I thought I'd pass on what was relevant for me.