Oh geez. I am so sorry this happened to you.
That was very much a violation, and I understand why you feel like you can't trust him any more.
I agree that counseling is important. He probably needs it too. Probably couples counseling at some point would also be good, especially if you feel like you want to try to stay with him.
Is there anything you can think of that would help you feel safer right now? Would it help to sleep separately until you find some sort of resolution?
Hang in there.