Kim - You can buy a safe and Sound thing to stop them rolling over, I got one for ds when he was probably exactly the same age. I don't use it now but he can roll back over heaps easier now. He has started to sleep a lot on this tum too. I rang Tresilian when dd was about the same age cos i was paranoid too and they said to put bub down on thier back and if they roll over , you can't be there all night to roll them back. I do check on them both heaps during the night though lol