I had a section 6 weeks ago on Wednesday . I was only comfortable slightly propped up and pillows to raise my legs slightly. I found keeping my pain relief topped up helped even if you don’t think you need it . This helped me when in bed . I was more mobile and less sore after day 8 xxx
I slept on my back with pillows under my knees. Getting out of bed was a different story but at least i could get some sleep
I had a c section Tuesday morning and in your exact situation. I’ve struggled with sleep all week and getting very frustrated!