I can only echo what
@kaz7 says n her last two sentences, especially about not pushing too hard. My doctor told me that just pulls you back. He also said it could take up to 12 months and he was correct. It was 12 months on St Pat's day last year I went into hospital with Covid and then pneumonia and only now that I am beginning to *fingers crossed* feel like a human being again instead of an ancient, pain ridden, exhausted antique!! Not quite ready to get back to matches but will hopefully make the last home game of the season v Chelsea (if I remember correctly) which is the day after my birthday and I was thinking of treating myself to hospitality but then figured I'd miss my usual crew and away from row A I wouldn't be able to shout at whoever might be Chelsea's manager at the time to get back in his technical area. (although by then it might even be a woman as their manager the way they are going!!) :-)
Good luck everyone. Let's hope this flaming Long Covid is over for everyone soon and the ME sufferers get some relief as well.