Sleeping on your back/back pain

Hey ladies I got a question, so is sleeping on your back bad or?? Because all this time I been sleeping on my back and I am 38 weeks I have tried since from the start to sleep in other positions but it never works out he doesn’t like it. Unless I sleep on my back and please if anyone has any remedies to ease back pain I am begging 🥺 you please let me know because I can’t even stand pass 5 minutes or else my back will hurt so bad to the point that I won’t even sleep 😩😔 please help me out