I got the Pfizer shot back in June. When I got the first shot my main issue was arm soreness. My arm started feeling sore immediately after the shot and got progressively more sore over the weekend. I got the shot on a Friday and the arm soreness went away by Monday or Tuesday. I also had a pressure feeling in my head , like a headache trying to start, but I went to bed around 8pm and my head was fine the next day. The second shot was a breeze. I didnt get the arm soreness like the first shot. And I didnt feel the sleepiness that everyone kept warning me about. I actually stayed up until around midnight the night of the shot. Didnt feel tired that whole weekend. I checked my fever during both shots and both times I never went over 98. Just pay attention to your body and get as much rest as you need.