Hot sleeper stuck laying on back

Hello all. I am an extremely hot sleeper. I usually toss and turn throughout the night because whatever body part is touching the bed gets super hot. I sleep mainly on my side stomach with one leg bend and one straight. We have tried a few different beds through the years and so many different kinds of sheets but nothing really helps.

I had a femeral osteotomy 5 days ago and I can only sleep on my back for several weeks. (Im in hell and my back is getting all the flames) Ive already developed a heat rash on my back due to this. I slept ontop of an ice pack last night but woke up hot a few hours later.

Does anybody have any recommendations on how I can keep my back cool while sleeping without icing out my partner? I've already got the air down to 62 and they are freezing..

Has anybody tried the chilipads? 1400 is so much but if I could resolve my issues it may be worth it. Thank you in advance.