I was definitely planning for a rough day after the second shot. Nothing but a bit of a sore arm with both shots. My shoulders are pretty bad, so the pain hardly felt any different than a workout. I didn't sleep well the night of the shot but I could have been just being worried about rolling over and feeling pain. Sleep in a chair that night and you will be fine.Finally got my first dose yesterday. Pfizer! About half a day in and the only side-effect is a sore arm, so I'm doing pretty well all things considered. The second shot will be the 'fun' part.