I keep hearing that if I don't put my baby to sleep at the first sign of her being tired, than she will become over tired and not sleep well. I was also told by the leader of our baby group that my baby shouldn't go more than 2 hours without sleeping (babe is almost 4mo). However when she first starts seeming tired I will try to nurse her or rock her to sleep and she will fight it. But if I give her longer time awake she will eventually just gently fall asleep in my arms with or without nursimg. By that time she has been awake closer to 2.5 to 3 hours. During this extra awake time she does seem tired. She yawns, rubs her eyes, and fusses a bit, but doesn't scream like she would if I were trying to make her sleep. But she also has been sleeping less than she "should" Yesterday it was only 12 hours total (I've read it should be closer to 14-16 hours at her age) Yesterday she had only 3 hours of nap so when I put her down for the night at 6:15 I thought she would sleep another 12 hours (of course waking up to nurse a couple times) but instead she woke up an hour later and refused to go back to sleep. I tried for 1/2 hour while she tossed and turned with her eyes closed and fussed. Finally I let her get up. She stayed up for another hour and a half and then went to sleep quite easily around 9:30. Then she woke up at 4:20 in the morning and wouldn't go back to sleep until 6:30 and then she only slept for another hour. I'm exhausted. I had no alone time yesterday at all. My husband wouldn't get up with her this morning because he had a job interview today. I have heard that sleep begets sleep so I don't know if she is sleeping so poorly because she is "overtired" because I am missing her tired signs and her sleep window, or is this just all the sleep she needs? Or is it because I was trying to mess with her sleep schedule by putting her down too soon after she woke up (within 2 hours). She has always slept well at night in the past. She would wake to eat and go right back to sleep. But this weird waking for two hours in the middle of the night has happened two days. I feel like its all my fault, but I don't know what I'm doing wrong.