Sleepy baby after 2 month shots

My baby got her 2 month shots yesterday and took a good nap right afterward and then was up cooing and smiling like normal and then was awake until like 4am fussing on and off, wanting to nurse until she finally fell asleep in my arms for about 4 hours. Today she hasn’t been fussy but has basically just nursed and then wants to go back to sleep. Is this pretty normal behavior for having just got her shots? Or could she be tired today just because she was up for so long last night?