sleeping arrangements for a newborn

i wrappeV & hen he started coughing & spluttering at like day 4,i freaked & roled him onto his side. My mum had made me a safety sleep (coz they so expensive) & so i used to wrap V then put him in the safety leep on his side. when e started falling ontois back, i would just tuck an extra lyf blanket in behind his back or roll a wrap up& place it behind his back so he couldnt roll backwardsbecause of how i wrapped him & where his arms were, he never rolled onto his tummy idothink, but again if you tuck the blankets in by their tummy & make a lil bulge, they shouldnt be able to roll much