That it does. Consider keeping a food diary in case you have less obvious intolerances. My doctor had me on a FODMAP diet after covid further screwed up my GI tract. I hope your symptoms subside and disappear through time. My blood pressure and pounding heartbeat went away after 8 months, so I mostly have PEM now. There is a fair bit of info on covid and long covid in ResearchGate. Pubs are geared to medical doctors and researchers, but still interesting reading. Have you been tested for neuropathy in case that is related the nerve issues? I have pre-existing polyneuropathy, but it hasn't progressed in the last decade. I do a lot of balance and dexterity training (mostly woodworking and gardening) to control it.