My daughter turns 5 months on Wednesday and she is still not turning from belly to back... She is a big girl - almost 20lbs. Doc said at 4 month checkup it might take her a little bit longer since she is bigger (more baby to move), however I am a little worried since she shows no signs of turning... We do tummy time a few times a day, she does push up on her arms a little and does push herself around the mat on her belly...Does anyone have any suggestions, exercises or tips they could share... Let me know..Thanks!