Need help

My c-section is scheduled for March 26th with baby number 2 but my oldest son is 15months old and is at my hip all the time if I walk if he screams and cry’s, if I move out of his site or put him down or if his dad holds him or try’s to feed him or do anything with him he screams and cry’s!! My husband is getting really mad/upset, but I don’t know how to get him unattached from me, or get him to stop crying over everything!!! How do you ladies do it?? With the new baby coming quick I don’t want him to feel left out or get jealous of the baby and keep crying and screaming all the time.