First of all I have to say that this is more than hurt. This is an event that threatened your safety and it is something that you should not have to endure. I know that it triggered a flashback, but that isn't the real problem right now.
I too went through physical abuse and when my son is just a little grumpy I go into fight mode because it triggers my fear from the past. Last year my son was in a rage from drugs and the fear that I felt was not from the past. It was from that event. You can't heal from the hurt when you are still in the middle of it. You can't live in the threat of harm and expect to heal from fear and anxiety. If I were you I would start with some support from a domestic violence counselor. You need support right now. You can't see clearly when living in fear like this.
I'm really sorry you are hurting. I know how that hurts. How did the kids deal with all of this? How often does this happen?