Hi . First, let me say that I hope you recover soon! Second, I hope some other warriors will chime in on their experience because this is a really interesting question.
While I haven't been sick with COVID, I can say that ALL of my endo symptoms flared terribly after my 2nd shot (but not the booster). Vaccines cause a short-term inflammatory response, which I'm guessing is what triggered my symptoms. My endo-related pain was intense and lasted about 5 or 6 days. In terms of COVID, it's well known that it causes a pretty intense inflammatory response. My best guess is that can trigger inflammation related to endo as your body tries to fight it off. And this goes probably goes without saying, but check in with your doctor if your symptoms get worse! - Keri (team member)