No wet diaper in 5 hours

My LO hasn’t had a wet diaper in 5 hours. She fed, napped for 3 hours, then fed again for an hour, and is napping again, but nothing in her diaper. We just started EBF after BF and supplementing with formula (tongue and lip tie recovery). I’m concerned she hasn’t eaten enough but she was feeding well and frequently today, and seemed satisfied after pulling herself off the breast after feedings. She is 6 weeks old.

Why does everything come up on the weekends when the doctors closed? 😔