I’m also a side sleeper too and of course my cancer is on the side I prefer to sleep on! After my second surgery I ended up putting pillows behind me on that side to stop me rolling over. My surgeon told me pain would wake me before I did any real damage but just in case I found the pillows helpful. Best of luck for the 16th. It’s a hard thing facing a second surgery when you feel like you’ve just started healing properly but in some ways it is easier knowing what to expect. Best wishes to you x