Ladies who broke up with kids father

I don’t plan to leave but things really aren’t going well and I want to make sure I’m not f****d if we do break up

What are some things you wish you were more prepared for

We currently have a joint account so I’m thinking of opening my own and just putting $1 in so it says open and I have an account set up if I need it

But what else???

We have $0 savings so don’t need to worry about him taking off with all the money