So interesting to stumble across this thread. I had my pfizer shot May 30, and by June 5th was having blood work done to try and figure out why I felt so awful. Initial blood work came back with a ferratin of 3, and a hgb of 10. I've never been anemic before in my life, not even when I was vegan. This marked the beginning of three months of crippling nausea and dizziness and fatigue. After many blood tests, every single one of my tests for inflammation came back sky high, complete with calprotectin (SP?) in a stool sample. I'm still trying to recover from this. I still decided to get my second vaccine (moderna), just unfortunate side effects that hit me I guess.