It is the third day after my second Pfizer shot and I am still here. I had no serious side effects. 
the usual sore arm which wasn’t as bad as the first shot.
I did feel a little more tired then usual but then I haven’t been sleeping very well because of a sore foot and a case of vertigo.
The second day my stomach was off a little but not bad.

All in all I would get the shot again if required.

Chuck