If the second shot is anything like my second shot you should be in and out within 20-25 minutes. First shot took longer because of registration. Truth be told you can experience nothing but a sore arm after your second shot, or feel bad after it. It's a crapshoot as to whether or not you'll get a mild or unpleasant experience afterwards. For the record I had an after my second shot.
Agree.
But I felt a little fatigue after the first shot too. Maybe that depends on vaccine type