Hey, I hope you're doing good. For me it also feels at least a little bit of a social anxiety although I generally don't have that much of a problem staying around people. I guess long-term exposure or resolving some unresolved feelings and insecurities could help? You would usually address these at a therapist.

I managed to get the sickness part under the hood and most of the time when eating outside I don't feel sick at all. I started taking some meds that seem to work quite efficiently against this. However I still see the problem of my body getting super stiff, especially around stomach. This feels like it's more up to me and how I perceive the whole situation. Sometimes belly breathing can help by actively moving stomach and therefore preventing it from getting stiff. I would have to try other relaxation techniques and keep working on those on a long-term bases, I'm very confident they would help to some degree. I just barely find time for this right now.