I got my 2nd shot last Friday. The day was overall stressful due to the weather and the long wait. I ended feeling very dizzy and weak. I also felt "feverish" but I didn't have a temperature. I also kept falling asleep and waking up at random times. I ended up mostly staying home, in bed for Saturday and most of Sunday.
I am also someone who deals with chronic fatigue, so being hit with fatigue from the vaccine put a bit of a toll on me. I don't think I got all my energy back yet, but I do feel a bit better. I still have a sore arm tho.