I got ME/CFS (closely related to long COVID) that first started in early 2020, so this is very relatable. As everyone was going back to normal I was getting worse. Do you mind if I ask what had a good effect? The only thing I’ve found that helps (other than rest and pacing) is nicotine patches for the brain fog.
Ah yeah, I’ve heard some promising things about LDN. My doctor won’t prescribe it for me though. There’s apparently a different version of it that’s being researched but it’s early days. Good luck with all.