Finally I find experiences I can relate to.

I am a healthy middle age female and I've always been on the same weight all my teen-adult life. I did exercise regularly and even lost pregnancy weight pretty quickly after having my kid. I never got tested for Covid but my husband did (he had it twice, different years). I only had a bad cough just for one day, no other symptoms so I assumed I never had it but then the extreme fatigue and headaches started and lasted for like 6 months or more, I also had extreme back pain, maybe kidney stuff? At the same time I started gaining weight very fast (40pounds in 2 months) and have been unable to lose it despite eating extremely healthy and swimming 3 times per week. Like if I move away from the routine, weight starts building up again. I have tested my blood, thyroid, hormonal profile, kidneys and all comes back normal. It really scares me, I have reached 165 pounds in 4 months when I have forever been around 110. Currently even if I try, I cannot exercise the way I used to or I become extremely fatigue, its like my metabolism got screwed.

I was also discussing this with a friend of mine and says she is in a similar situation (she has always been very slim until recent months) she also relates her weight gain with Covid...

I hope this gets investigated to find the cause of it. It really sucks to have no control over my weight anymore.