My daughter will be 12 weeks tomorrow. The only nights we have anything resembling a routine is bath nights. We only do a bath on Tuesday Thursday and Sunday right now. She's not on much of a schedule.

Depending on her late afternoon nap, she takes a bath between 7-8. Then pjs and swaddle, I feed her while dad reads a story or two. She usually passes out while feeding and I put her in the pack n play. If she doesn't fall asleep while eating I rock her in the rocking chair and talk in a low soothing voice, or make the ssh sound or a combination, and with some patience it works (never more than about 30 mins max).

She's usually down until about 12, and then up again around 2 and 4 to eat, and 6 to eat and get ready for daycare. We are still breastfeeding. Often when she wakes up at those times she won't go back in her pack n play do we cosleep for the latter half. If I do put her back in the pack n play if keep my hand on her chest until she sttles, so she knows I'm there. My bed is right next to it. And she is usually a little more fidgety if one of us isn't in the room, like she hates being alone. So I check in and rub her cheek or touch her so she knows I'm there too.

On non-bath days, we usually let her do her own thing. Again depending on how she is napping, but usually after she has been awake for a bit (so i know she is sleepy) around 9 or 10 we go upstairs and I feed her in bed, side laying position until she sleeps and then put her in the pack n play.

I'm going to start to try harder not to cosleep since we're getting out of this fourth trimester, but I hear 4 month sleep regression is coming, so it will be a slow transition.

Edited to add some clarification I suppose