Pregnant and Single

Hello all! Im new to the board, my name's Jess I'm 22, and 17 weeks pregnant. My partner & I spilt two weeks before I found out I was pregnant. Since then we have been trying to work on things (it was an amicable "break", we thought we would work things out after he got his life in order a little better) Recently  there's been some set backs, and the plan of us getting married in the near future to be a family isn't looking like it will happen.  He still wants to be apart of our son's live and involved on all levels. But I feel the need to prepare myself for the worst case situation of him leaving. So my question is, what are some things you think we need to go over as far as planning for the baby? As of right now my list is almost non existent, with Childcare & Visitation being the only things on it. I know there is a ton more of things that we need to go over but I'm blanking. Help!!!