Hi, my daughter will be 2 months old tomorrow. She rolled tummy to back for the first time last weekend during tummy time but I haven't seen her do it since. We have stopped swaddling her because she was breaking out of it, and since we stopped swaddling she has started to roll onto her side at night. We always place her on her back to sleep and she rolls onto her side on her own. Is it safe to leave her or should we reposition her onto her back?