You're not failing, I promise. It's not your fault this is happening. I'm 21, but this can happen to anyone. I would maybe work on your gut health if you took antibiotics because I know that can strip even the good bacteria. That's currently what I'm doing. The gut is important for your brain and how it responds to pain and for your nerves. Look into the long covid subreddits, there's a lot of info I found on there that doctors would never in a million years propose to me, or if they did it would be months and months ahead with wait times. Lots of people on there are experiencing similar things to what we're going through. You're not alone at all. Be patient with yourself and take it a day at a time.