What do people get given for brain fog?

[Periornot]

I've got long covid, but also suspect there is an overlap with peri symptoms. I'm still having periods although they're about a day shorter, and whilst I've always been heavy, there is now a day per month when I'm ridiculously heavy.
I also have excessive brain fog, fatigue (have had to stop work) and nausea.Doctor said that this is unlikely to be helped by HRT. They also say that hormones will naturally drop so don't do tests after age 45.

I would love a bit if my life back. It's obviously affecting mood (doctor did say they could give me a mood tablet, but I said I'd rather tackle the symptoms making my mood low, which is being in this limbo state)! I know covid can accelerate menopause symptoms, so thought surely it's possible for some overlap and to treat both? I asked what treatment they'd advise for someone without long covid getting brain fog etc and it was just reduce stress, so some exercise etc. Is that really it? The thing that is stressful is not being able to function! Has anyone had any luck with doctors and what treatment has worked for you? Surely there must be lots of people in peri who don't have night sweats? Exercise is a no-no at the moment due to long covid. Apologies for rambling! Hoping someone can help!

My (vast array of) specialists disagree about the exercise and actually think it's very important. I had some (very expensive!) autonomic function testing done at Harley St (actually by the scientist who was the first to identify that loss of taste was a Covid symptom - so a super-smart and fascinating man) which confirmed I have long Covid and that it's badly affected my post-exertion recovery and my autonomic nervous system. But I have persisted in trying to do some exercise, mainly because I'm a stubborn fucker and I feel like I have lost so much due to Covid and I won't let it take this last bit of sanity from me. In 18 months of long Covid, there has only been a period of 4 weeks when I wasn't exercising. I was advised to only do 70% of what I felt capable of. I didn't feel capable of very much/anything and at first even a slow shuffle along my road wiped me out for 3-4 days afterwards. But I kept forcing myself and I slowly improved. It was worth it for the mental health boost. I've had long Covid for 18 months now and although I am much improved, it's all relative and I'm a shadow of the person I was pre-Covid. But I'm getting there. I was deadlifting in the gym this morning and have walked 10km today so not doing too badly. I also started HRT 3 months ago and that is helping. Because so many long Covid symptoms are non-specific, it's apparently quite common for mid-life women to be diagnosed as having ongoing long Covid when actually some of their symptoms are due to peri-menopause rather than a continuation of long Covid.