Feeding

Hi All, Firstly Happy Mothers Day💐💗 My LO is 3 months old, she is bottle fed and for the past couple days she seems to be quite fussy when feeding. She moves about a bit, uses her hands to push away her bottle(whether she means to I don’t know). I went a size up in her teats as thought maybe she was bored and flow wasn’t fast enough which has made it better but still bit fussy. She manages to finish a bottle but taking longer than it used too. Anyone else gone through this? Is it wind? Is it something to worry about? Do they just go through a stage? She may be just feeling off, its been like it since her second lot of jabs. Thanks in advance for help / advice 😘