I'm raging *anger stage* does someone know a good coping strategy?

So this didn't happen to me in my last N breakup. But this second time around (with another N) I'm seriously raging seeing red mad. I wake up with my fists clenched. I'm mad at him for being pathological, manipulative, abusive and I'm mad at myself for falling into the trap, again. I'm angry angry angry. I would never reach out to call him but it's almost as if I'm having PTSD nightmares, flashbacks.... it sucks. How do I let go of this intense anger?