Can’t sleep in boyfriend’s house

So I have lower back problems and the bed I have in my apartment works decent. My boyfriend’s bed is more firm and I can’t sleep at all as my back feels so much pain after being in it for 30 minutes. His guest bed is the same and I hard horrible sleep for two days straight. He says that I should not sleep on my side all the time, but it hurts even when I rest on my back!

It makes me not want to visit the boyfriend’s place anymore since I will just be irritated from the lack of sleep. I’m going to tell him that I cannot sleep in those beds but how can I fix this issue? Maybe a soft bed cover? Any ideas would be great.

Update: It’s been like 5 months since being dumped and my sleep has been a lot better. He didn’t give a crap about my sleeping issues so uh lesson learned from this...if your boyfriend doesn’t care about your health, just dump him.