Jazzygirl, I healed my long-haul symptoms completely, including depression and anxiety brought on completely from Covid, by supplementing heavily and eating a very specific diet. You MUST cut out sugar and other inflammatory foods. If you can also eat low-histamine that will help too.

In your case, for supplementation, I would start with B-3 (niacinamide, non-flushing form, 500mg, 2-3x per day) and L-tryptophan (1,000mg before bed, empty stomach). Only take the tryptophan if you are NOT taking anything else for mental health -- ie a prescription for depression or anxiety symptoms -- do not mix them. In my case, the tryptophan was enough to treat my mental health symptoms.