Please tell me this is normal

My little girl is a couple days past her 12 week mark and starting on Thursday she’s been A LOT more fussy. Won’t nurse longer than 5-8 minutes at a time and is fussy on the breast. She’ll claw at my skin and just seems really irritated. She’s having plenty of wet diapers but as a ftm I’m still nervous she’s not getting enough. She’s also sleeping more during the day but doing her normal 8-5 sleep at nighttime