Our 5 month old daughter fights nightime sleep. We have a routine which we start at 7:30pm (when we first notice her sleepy signs)...massage, bath, nurse, read two books, lay down in the crib, put on white noise machine, kiss goodnight. She was learning to put herself to sleep and generally would go to sleep with just a little fussing (a few "mehs" and she was out, more like her just trying to get comfortable). All that changed last week. We'd do the routine but as soon as we kissed her goodnight and went to leave the room she'd start screaming and crying. So we'd hold and rock her and nurse her. eventually she'd fall asleep while nursing around 9pm. I'm really tired of taking an hour and a half every night to get her to sleep and I do want her to learn to sleep on her own with out me nursing her! right now I have to nurse her in bed and then sneak her into the crib asleep. What I can't figure out is I nurse her as part of the routine and she's not sleepy from it (around 8pm) but it's not until I nurse her again at around 8:45pm that she falls asleep.
I know she can put herself back to sleep because she does it when she wakes in the middle of the night (I nurse her and then put her back in her crib and she's awake and she's fine). It's not the crib because she's been sleeping there since 4 months old (we previously co slept and she needed her space so we moved her to the crib and she was happier).
My husband thinks she is just wired to have a later bed time but I disagree...I don't think it's healthy for a 5 month old to be awake for over 4 hours at a stretch. I'm also wondering if it's connected to teething, and/or developmental as she's learning to roll from back to front and just mastered front to back.