my baby is 5 month due 6 days and her weight is 6 kg. her birth weight was 2.5 kg. she rolled over to her back 5 times from 3 month onwards. but she is not doing it continuously. whenever I give tummy time she rolls to her back. also sometime I give tummy time she rotates in her stomach itself. but she is not trying to continuously roll over. but mostly she rolls sideways on both sides. is it okay? I think she doesn't like to lay on her stomach or is there any problem with her?