I suggest you arrange your life such that you can live without his child support money. He sounds so financially and mentally unstable as to be a poor bet for consistent payment in the future. That's rotten, but better to be prepared and have it not happen, than not prepared and have him drag you down with him.
You're doing great btw. It's a lot to recover from that kind of dysfunctional relationship and be a mum all on your own but you are killing it!
