If you think you have long Covid, you should do some research about CIRS (Chronic Inflammation Response Syndrome). It is a condition caused by exposure to toxic mold from water damaged (inside or out) buildings. There is growing evidence that there isn't actually a separate condition for long Covid, but rather it is Covid-triggered CIRS. (Lyme can trigger it too). (Note: only about 25% of people are genetically susceptible to suffering from CIRS)

CIRS causes your body's call-and-response immune system to short circuit; meaning one part detects the problem and the part is supposed to fix it but the part that is supposed to fix it (remove the mycotoxins) doesn't see the problem and does nothing. CIRS causes a lot of side effects, including all the ones mentioned by the GP and many more. If you want to test for toxic mold, you need to test the dust in your space. Some amount of mold is naturally in the air at all times. The dust will show and accumulation of mold over time and show if there is a real problem.

Source: I thought I had long Covid for a long time, until I realized the real problem which was toxic white mold in my house. I threw everything in a dumpster and sold my house and am now on the long slow multi-year process of recovery. If you think you may have it, try pushing Mg, Zinc and Potassium really hard for a few weeks. Take things that naturally bind the bile in your gut (the mycotoxins attach to the bile which is recycled). There are heavier binders that bind everything but I wouldn't start there.

I am just offering a different point of view, not disagreeing with the other experiences on this thread.

I d like to think I have fully recovered from confirmed Lyme diagnosis with Doxycycline for 14 days. I had fever and weakness for a week and lowest HRV reading my Fitbit ever recorded (7ms v 50ms avg).

Interestingly, I have a lot of symptoms like anxiety, sleeplessness, and brain fog even today, but I know for a fact I had it even before Lyme. It had peaked during the COVID times when I sat at my desk working over 10 hours on the regular because there was literally nothing else to do.

So at-least in my case it seems COVID was the trigger and Lyme didn't seem to move the needle much either way.

I had this starting around the beginning of COVID. Was it COVID? Did I get COVID at all? Plausibly, but not definitively. Did I get it at that time? Almost certainly not as I stayed isolated and got tested whenever I wasn't. It could be aging but I think a lot of people chalk things up to aging that are actually due to non-aging-related causes - you just accumulate more past as you age so you're more likely to have encountered whatever the cause is. I did go camping several times, once in a region known to have Lyme, without being vaccinated, but that was years after I started noticing chronic fatigue. Conclusion: I really don't know.

At least some of my cognitive decline is surely related to my attention span, which is not aging-related at all but more to do with the modern information-flood environment. A few minutes ago I misread "scripted" as "sculpted" in an HN comment and then stopped to reflect why I did that. It wasn't because I can't read, but rather because I was skimming over that comment really, really fast, because that way I can view more comments.