My baby will be 4 weeks Monday and almost every night my husband and I sit up for four hours or more trying to get her to sleep. She nurses, and drifts off, for four hours or more. When she stops and unlatches we burp her and try to lay her down but she wakes up fussing then starts screaming until I start to nurse her again. She does this even when she seems to of had a good feeding. She is gaining weight and has plenty of poopy and wet diapers every day too. Is this normal?!? I feel so bad because I'm SOO tired and just need some sleep!