ok i know i asked this before about babies sleeping in bassinet...but my son will only sleep good on…

ok i know i asked this before about babies sleeping in bassinet...but my son will only sleep good on his stomach..when he naps i put him on his tummy on the couch..which im at all day anyway so i cak watch him but thats is the only way he will sleep for along time...he sleeps on his tummy on my chest right now and has since i brought him home...i know its not safe to let him sleep on his tummy...i need suggestions or tips on what to do ....i cant keep sleeping on the couch with him its hurting my back 😔....