Idk what to do tbh 😭😭 my son used to be so good . Put himself to sleep all that. The. Sleep…

Idk what to do tbh 😭😭 my son used to be so good . Put himself to sleep all that. The. Sleep regression hit . And he needed to be rocked to sleep, but that was fine . Still slept alone in his bassinet or crib and all through the night . Well about a month and a half ago he got a nasty cold . Couldn’t breathe well. Then croup. Literally couldn’t breath out of his nose for a good month month and a half . So he was in bed with us so we can keep an eye. I’ve been trying to put him in his bed all week. Last night I got lucky . He slept in there from 12-6 . Tonight he wakes up and screams when I put him in. I’m in tears , I’ve tried letting him cio but I cant do that. I’m not that kind of mom. I cannot see him cry like that. Help pleaseeeee 😭