I am in desperate need of help lol

I let it go on for way tooooo long but I figured I was never having any more kids so it didn’t matter if I coslept with my son and now I am 27 weeks pregnant and still cosleeping and I cant take it anymore!!!!!!!!!!!! He never liked his crib. EVER. I tried the cry it out method and he threw up so that’s not an option. I don’t know what to do anymore. I’m exhausted and in pain and uncomfortable every single night and day from cosleeping at this point. My in-laws bought him a toddler bed and we should be getting it soon but how the heck will I make him sleep in it?