D.H.
I would put him back in the crib. Just because he learned to climb out, doesn't mean he is ready. He must learn to sleep there, and not climb out of the crib....if he does sleep well there, then he should not be climbing out or screaming in the middle of the night. I know he's two,but ask him what he is screaming about. Is he scared? I know how hard this is for you. Hang in there, it will get better.