4 month eating regression?

Courtney • Proud momma of a beautiful baby girl ❤️❤️

My baby is 4 months old on Monday, and is eating less than normal. I breastfeed, so I can’t tell you how many ounces she is taking, but she is refusing the boob more times than not.. the only time she’ll eat is if she’s tired and even then she doesn’t seem to eat much. Her diaper output is normal, about 12ish a day, sometimes more and sometimes less. Is this normal? I don’t know what to do, because she refuses the boob!