My 22 month old has always slept through since about 8 weeks. For the last 7 weeks she's been sitting up in her cot crying and saying mama. All I have to do is go in and lay her back down and she goes back to sleep. But she's doing it like 5/6 times a night. I've tried changing her to a duvet from a sleeping bag and she's now back to a sleeping bag. Tried anbesol thinking it was he last back molars coming but no sign of them so far. Help!!