I feel trapped, I don't know what to do

My husband and I had a big fight and I was ready to walk out, things go a little physical and I'm done dealing with feeling like I'm less or not enough.

The real breaking point on this fight is when he put our son in the middle of it.

I want to leave, I want to take my son with me, I'm his primary care, but I can't.

My husband has threatened that if we went to court over custody, he would do absolutely everything in his power to make sure that either, I can't see my son at all or that I get a couple supervised visits a month.

Unfortunately he comes from money and could probably find a lawyer that will do this to me.

So now I'm trapped, either I leave and possibly say goodbye to my son or I stay and deal with my husband but get to see my son every day and be with him.