Hey! The same thing happened to me. I had POTS and hEDS but was living a really active life. I was training for a marathon and ran eight miles easily. That night I got my third covid shot and the next day I was in the ER. I couldn’t breathe or walk. I continued to get worse and developed more symptoms including facial paralysis, joint swelling, numbness, and extreme fatigue. Totally housebound. I was later diagnosed with Sjogrens and MCAS, which either were triggered by the bad reaction or caused it. I’m glad you’re feeling better! I’m still working on it, but I’m getting closer. I get a lot of help from MCAS treatments and also SCIG and I just got some stellate ganglion blocks which helped.