5mo in her own room

Recently my boyfriend and our daughter moved into a new house and we gave her her own room..well all her life she has been in a room with us we have the space now to give her her own room so we did the first couple nights were rough and then we had a couple good night's where she didn't fuss and she slept through the night now we are back to the rough nights and idk why :( any suggestions for helping me to acclimate her to get new room or make anything better so we go back to the good night's? I'm not sure what to do I have a fan on low in there for noise a string of butterfly lights as a night light and she has a bear that I set beside the crib that plays nighttime music. I have the fan because in our bedroom before we had an air conditioner so I wanted that same noise I just wonder if she isn't getting too cold or if it's too loud I make sure she is in a medium weight sleeper and socks the fan isn't pointed near her idk what to do.... she has slept through the night since she was 2 months old I want those days back lol