I’ve been sleeping at about 45 degree angle….had my 1 week check yesterday and asked about it coz was worried I was too flat etc and she said the position I was on the bed in the post op room was ok….and that was flatter than I had been sleeping! It’s mainly yo help with the swelling…..so unless u have been instructed otherwise, you can maybe flatten yourself a bit….defo easier to sleep then! I’m sure she said 7-10 days to lie on your back….not sure about sleeping on your side, will check next week! Any worries I’d ring the mya nurse tho xx