My daughter is 3 1/2 months. She's been rolling over from back to belly for the past month. I decided to stop swaddling her at that time. Last night I woke up and saw her face down! I kind of panicked. Everything was ok. I flipped her back over and went back to sleep. I woke up a little later and sure enough she was face down again! I just left her and she ended up sleeping a really long time that way. Am I in the wrong for letting her stomach sleep?