Fussy/gassy? not eating

I was so used to my son eating every 1-2 hours and now my daughter seems to have gas? Or not want to eat sometimes for 4 hours at the end of the day and it’s starting to make me nervous. She seems to still be having plenty of wet and poo diapers as of now but I just put her down for a nap with a dry diaper 😕 she hasn’t eaten in 4 hours. I had to walk her around as she seems gassy and kept offering her the boob but didn’t want it 🤷🏼‍♀️