Yet another anecdote, but my wife and I both got COVID. I was quite a bit sicker than she was.
I later found out that I'm a type II diabetic, and almost certainly was at the time I had COVID given the timing. I had fairly severe fatigue symptoms preceding that diagnosis, and the diet/exercise changes I made to bring that under control look a lot like what your wife did, and also seem to have alleviated the fatigue.
There was about a 12 month separation between recovering from COVID and my own fatigue symptoms. Had the timing been a bit different I likely would have assumed I was suffering from long COVID, and would probably have been less inclined to see a doctor as a result.
None of this is to suggest that any given person is suffering from diabetes, that long COVID should be treated the same way, or that any given person with long COVID is self diagnosing. For anyone that is though, definitely consider talking to a doctor. Coincidences happen and you could have something that is both unrelated and treatable going on.
I later found out that I'm a type II diabetic, and almost certainly was at the time I had COVID given the timing. I had fairly severe fatigue symptoms preceding that diagnosis, and the diet/exercise changes I made to bring that under control look a lot like what your wife did, and also seem to have alleviated the fatigue.
There was about a 12 month separation between recovering from COVID and my own fatigue symptoms. Had the timing been a bit different I likely would have assumed I was suffering from long COVID, and would probably have been less inclined to see a doctor as a result.
None of this is to suggest that any given person is suffering from diabetes, that long COVID should be treated the same way, or that any given person with long COVID is self diagnosing. For anyone that is though, definitely consider talking to a doctor. Coincidences happen and you could have something that is both unrelated and treatable going on.