My first shot of the Pfizer vaccine was on Friday. I have a lot of symptoms on a daily basis, so I'm pretty sure I wouldn't have noticed if it caused any of those. Two things really stood out:
1. I had a migraine on waking up that morning; a few hours after the vaccine, it was completely gone.
2. About four hours after the shot my arm hurt and grew stiff enough that I couldn't lift my drink or move my computer mouse. Later, the stiffness migrated to my chest and neck on the side side of my body, causing a small, sharp, intermittent stabbing pain on the side of my sternum, and a kind of choked, stretched, numb feeling in half of my throat.
The pain eased a bit on Saturday, but it still hurt to lift things or move my arm a lot. I could move my arm and lift things again yesterday, as long as I didn't overdo it. Today, the pain is almost completely gone and I only notice a very small spot of soreness if I actually press fingers to the injection site. I think maybe my headaches are getting ready to return, too.