Wet Diapers

First time momma here! The last day or two I feel like my daughter, who is a month old, isn’t peeing as much. Usually I have to change her with every feeding and after every nap. Right now it’s barely any pee if it’s not dry. She’s breast feeding and will have a few good ones during the day. I don’t know when to be worried and call the doctor. She is still eating and right now she’s eating more than she has been. Please help this worried momma!