My LO is 7 weeks and she's going 4 hours between feeds. This just started yesterday. Is this normal? Or should I still wake her after 3 hours? In the evenings she goes for 5 hours (that one I'm not too worried about b/c DH and I love the extra rest). She has her 2 month follow up next week and I'm paranoid about her weight. I don't want them to tell me she's not gaining sufficiently and to supplement.