Toddler Bed

I bought Tristen a toddler bed a month or so ago. The crib he sleeps in is borrowed and we need to give it back. But it's too big for us to buy a new crib. But he just doesnt want to sleep in the toddler bed. So Im really stuck. So yesterday, I took apart the crib and put his toddler bed in the same place as the crib had been. I had to sit with him for awhile and he finally took a nap in the toddler bed. But only for 1 hour. Usually he sleeps for 2 to 3 hours at naptime. So then last night I had to sit with him again. I got maybe an hour of sleep and he woke up and screamed til I went in there. I ended up staying up in his room for several hours and every time I tried to leave he would get up and scream again. Finally at 3am, I moved him to my bed with me and Breanna. Yeah, Breanna peed her bed again so she was sleeping with me too. Im debating putting the crib back together. Im soooo tired. And Tristen is still sleeping in my bed. I gotta figure something out soon. But for now, Im going back to bed.