I got the Covid-19 vaccination booster yesterday. (a.k.a. "second dose") It's the one that is supposed to make people feel crummy for a couple of days. In my own case, my arm has been a little more sore than after the first shot, although almost 24 hours in it's already getting better.
I popped some Tylenol as soon as I got back into my truck after getting the shot and kept it going every 6 hours. I was able to function all day as per normal. As far as I can tell, I've never run a fever. I had an extremely mild intermittent headache for a few hours but don't really know whether that's due to the vaccine or not.
We'll see what today brings but it feels like at this point I'm trending away from whatever side-effects there were.