I spent my first night on my side only a couple of days post op. The second week after having my strapping off, I was in too much pain but now I’m the same as you and just wake up on my side. I also had a few hours the other night on my front. I’m assuming if it’s comfortable then it’s ok? I’ve not been told at any point that I can or can’t sleep any way in particular? And my thinking is, that we heal when we sleep and if laying a particular way means we can sleep then that’s got to be a good thing?? 🙂