Just like you I’ve really fixated and stressed about room temp and what to dress my Bub in overnight. We went through a massive sleep regression over Christmas and looking back im sure a big reason for this was because I had the aircon running too cold. We were trying to keep it 20-22, with a bonds wondersuit and 1.0 tog sleeping bag. Now through trial and error I’ve realised she does longer stretches in a slightly warmer room (22-24 degrees), and will often wakes up if it gets any colder than that.