I had debilitating long covid for 18 months and honestly I thought it was going to be for a lifetime, especially when I read so many success stories of others getting over it after 3-6 months and reading online wisdom about it pretty much being CFS. I'm not sure what my body did but I'm thankful it healed itself and I now live in fear Omicron, which if caught might set off another 18 months for me. My brain is not nearly where it used to be and my body tires out very easily, but the bad brain fog, intense irritability, and incredible fatigue episodes are gone and I'm thankful. I don't think people realize how common this is and what it can do to you. The only reason I still have a job is because I was able to hide this because of work from home and some creative solutions on my part and a checked-out, mostly apathetic supervisor. I think I slept 1-3 hours of the workday everyday and maybe could have enough mood, focus, and energy to be productive for a window of maybe 60-90 minutes a day.
I hope you recover soon.