Sleeping Help

Those babies who sleep through the night for 10-12 hours, what’s your secret? How do you put your babies to sleep?

My baby used to sleep long stretches but the past few weeks she wakes up 3+ times. The past few nights she screams the moment I put her down to crib (separation anxiety?!) HELP!

Our bedtime routine: solid-bath-PJ-massage-book-boobs. (She was always nursed to sleep and she was sleeping through just fine.) Everything after bath happens in her room, dimmed light with white noise on.

She used to go to bed around midnight without any sort of nap schedule/ bedtime routine (but sleeping 8-10 hours without waking). We started doing bedtime routine and pushing her bedtime to around 8pm. That totally messed her sleep?! Ever since we started her nap schedule & bedtime routine, she isn’t sleeping well anymore. Now I’m stuck in her room from 8pm to way past midnight only for her to wake up several times😶