It sounds like you had a very harrowing experience. I think a lot of us can relate to that. You cannot change the past. What's done is done. The important thing is to have a plan going forward. What will you do if you find yourself in this predicament again? (And it's likely you will, or even worse.)
I would think 911 is a good option, but that's just what I would do. What can you do that would cause you less trauma? (Knowing, of course, that you cannot change his choices or behavior.)
L