I have SIBO which is when you have more bad bacteria than good. I had to take really strong antibiotics twice to deal with this. My larger issue is that I have gastroparesis. I had a 4 hour food emptying test which I was later told was not reliable. Long COVID is attacking my autonomic nervous system. This impacts my GI causing gastroparesis. My food does not empty correctly, it builds up in my system. My appetite gets smaller and smaller as it goes and then I empty which feels like I am going into labor. I have cramping and pain with this. I take Dexilant daily for my awful GERD/Acid Reflux and have hyoscyamine for the awful cramping. It helps a little. This is cyclic, so once I have the horrible emptying phase it starts all over again. I have neuropathy also. Anything that impacts your nerves impacts how you feel such as pain, body temperature, etc. I am freezing most of the time. But then I can be sweating with in seconds. Your nervous system regulates your body. Are you being seen by a Long COVID clinic? They can't cure you, but they can help you with plans to mitigate some of the symptoms. I can deal with the body temperature changes but I hate the GI issues and there is not much they can do for gastroparesis. I take Gabapentin and Cymbalta to help with the nerve issues as they also cause horrible pain all over my body. I recommend trying to get into a Long COVID clinic as soon as possible. For me it is helpful to know if issues can be fixed or not so I can then mentally deal with it and learn how to survive it instead of thinking I am going to be cured. Good luck. This is miserable and I am so sorry you are experiencing this!