My husband has cut me off financially can I leave the state with my son to survive?

I live in OH and am married however my husband has threatened divorce for over a yr and a half. He gave me questionnaires to fill out to get the marriage dissolved and when I filled them out he decided he was having 2nd thoughts. Then said he was leaving them staying. He tells me that I can only move to CT where we are originally from or FL where the woman he had an affair with that resulted in a child lives. He says he will go where we go but also says he can tell me where to live. I want to go to live with my mother in SC where I will be able to rebuild. He says that's not in our sons best interest even though my mom would watch my son for free while I work. I am hoping if I just go his hands will be tied. If I dot do something soon I will be living in a box as my savings is dwindling and I've already had to cash in a pension to survive. I can't find a job locally that will pay enough to cover more than the cost of child care.