Ohio has a "duty to warn" law which says therapists must warn potential victims (if you said you were going to kill someone) and report threats to themselves (if you told another therapist/mental health worker you were going to kill your T) but, unless you are a minor, I don't think there's anyone to "report" to that you were hit; that's part of your "job" to report to police or not, etc. regarding your own health. I imagine if you told your therapist your husband said he was going to kill you and your therapist didn't think you could deal with that, etc. they might report something.

Why don't you ask your therapist; ask your T about the "duty to warn" and reporting laws in Ohio, etc. and find out how your T interprets them, etc. But, usually if you "know" something and get to choose to file a report or not, etc. then no one is going to step in and save you; it's only when someone is clueless as to what's going on, if the therapist has information no one else has that can affect other people.

No one is going to step in between you and your ex-husband; if it were to affect your mental health, if you became psychotic as a result of the fight with your ex you might be hospitalized as that's the area your T works in, psychotherapy. But your physical health and life circumstances they're not going to mess with, especially if you don't want their help.