Help pregnant court and child custody?

My husband up and left 10-20-16 had a new mistress by 10-22-16 took my daughter to meet her that day 2 days literally 2 days ugh anyways now he finally filed the divorce BC I refused to pay for it beings I have bought everything for our kids he hasn't even bought one diaper for our son anyways I'm pregnant with baby #3 and found out Friday I have court on Tuesday. The baby I'm currently pregnant with is already showing signs of fetal distress what can I do to talk the judge into holding it off 3 weeks I just want my baby to have a chance to not become to overly stressed BC we are going to fight for custody of the kids and I know it's going to get bad. Any advice (I live in in adultery don't mean shit)