I got my first Covid-19 vaccination on Saturday, March 6th. It was the Pfizer version. I felt a little odd after it—kind of like I had drunk too much coffee. That feeling went away in about fifteen minutes, and my arm was sore that night and the next day, just like with a flu shot. Aside from the pain around the injection site, it was no big deal. My next dose of Pfizer was on Saturday, March 27th. I didn’t feel odd like I did after the first one. My arm started to hurt soone