Is 6 hours between feedings ?

My baby is Breastfed and last night she nursed and slept at 1. At 4 she woke up with a wet diaper but refused to eat, she just went back to sleep. I woke up at 7 and woke her to to nurse and she did then but I had to wake her. She is 7 weeks now. Is it ok for her to go so long? My husband thinks I shouldn't wake her to feed because she knows if she is hungry but 6 hours seemed long enough.