I think you need to let the rage out some how with out hurting any one. Keeping it in is not going to work. You can try jogging, running, going to the gym, going to a park where no one is around and scream profanity, go to a junk yard and smash up a wrecked car, demolish some thing, chop a tree down, some thing, any thing. Therapists mean well but they don't always get it. IMHO it has to come out.