Hi Spyralle,
I can understand why you're raging and I'm sorry you're going through this.
I grew up in an angry, raging house, so anger and rage were a way of life, but I always hated them.
I used to ask my T "what do I do with my anger"? In retrospect, my T had 2 responses: One for immediate anger (rage) and the other for the overall issue of anger.
For rage, my T suggested a "Body Scan": getting in touch with your body's sensations and calming and relaxing those sensations: For example, become aware that your temples are pounding, you're making fists, your muscles are clenched, your palms sweat, etc. Now, do slow deep breathing and starting from your head and working down to your toes, relax each tense, clenched muscle. Go through each tense and clenched body area and relax it. This could take anywhere from 3 to 20 minutes. It works. You will feel calmer and less (or no) rage.
For long term anger, T basically said that when I when I really analyze the problem and understand it, then I won't feel anger. I don't totally agree that analysis of the problem has totally gotten rid of the anger, but I understand better what caused the anger, so I guess, in some instances, I substituted understanding for anger.
I'm not a T and I don't mean to be a Sunday morning quarterback, but I think you may be angry at yourself for being "conned". For me, feeling like I was conned is the basis of my anger. I ask myself "how could I let myself be conned? Why was I so stupid and blind?" and I answer, "I didn't realize I was being conned or blind".
So, I realized I was unaware of red flags and signs. Then I forgive myself for not knowing what I didn't know. But, now, I know and I try not to repeat the mistake.
But, this is not a one shot thing. Issues come up and I feel sad and angry and I start the process again: Body scan for rages, then analyze the problem, then forgive myself for not knowing what I didn't know. It's a process. If you practice it all the time, you will feel better. But, it is work and you have to work at it.
So, with anger/rage, think about calming both body and mind.
Remember, the rage and anger hurt you, not your N. So, try to love yourself and not let the rage hurt you.
Also, both physical and relaxing activity helps to calm the anger/rage: Go to the gym, take a walk or take a warm bath.
Also, I really like this web site:
http://www.angriesout.com/index.htm#grownups.
I hope you feel better and wish you the best.