She hadn't peed in the one I changed at 11pm before I fed her and put her down and not in the 3am change either and was too sleepy to eat much just now. Am thinking to give her a bottle of pumped milk for next feeding to see exactly how much she eats, but she gets pissed at me giving her a bottle lately, she prefers boob. She's 4 weeks 5 days old. Should I be worried? I guess if she hasn't peed in the next one I will be....