Yes. had COVID Nov 1st and was very ill high fever also. I had the GI symptoms also. Was better in 2 weeks and then experienced the exhaustion. It is now Jan 16 and am on 2 antibiotics for a GI inflammation. On the 12th of Jan. the abdominal cramping began again as well as the pain in the area of the stomach. Starting to feel a bit better, but the treatment will be lasting 3 weeks. The body must be working hard to eliminate the virus and its mutations. there is no real explanation why this happens to some people and not to others.
Yoghurt==with natural microbes --plain and no sugar will assist the gut to get its normal flora back [the good microbes that we are supposed to have]. Delete all sugars from the diet --no actual sugar, no sweets or desserts as sugar depletes the good microbes and allows the bad microbes to grow and give cramps and diarrhea. I am doing this to get back to normal. [Because am on antibiotics for 3weeks I need to be sure to leave 2 hours after taking the antibiotics to eat the yogurt because otherwise the antibiotic will also kill the good microbes in the yogurt.