We started sleep training our 4 month old about 8 days ago and it's going really well... Except the bedtime routine. She screams through the whole thing. I take her to her room, change her diaper, nurse, and read two books. She screams when I start to change her diaper and sometimes she's too upset to nurse. If she won't nurse I read the stories first and try again. That has worked so far but the screaming is pretty distressing.

She usually wakes up from a 30 min nap at 5:30 or 6:00 and I put her down at 8:00. She doesn't scream at other diaper/outfit changes.

Anyone have experience with this? Do I need a longer routine or some sort of transition step? Is it nap related?