You have my sympathy, that's a horrible situation. I haven't ever been in a situation like that, so my advice may be useless, but in my experience, anger is more-or-less like poison for the soul, and it tends to feed on itself. The only way I know of to deal with it is to let it go. The anger you have is justified, and I doubt you'll be able to consciously control all of it, but if you can let go of some of it, it might help you feel better. I'm not suggesting that you forget it all, or that you try to think that it's all ok (it really isn't), or that the perpetrator doesn't deserve your anger, just that you should try to avoid holding onto your anger, if you can.
I've dealt with some anger recently and that helped, but it was over a much, much less severe situation, so I don't know how well it might work for you. In any case, I hope you feel better soon.
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"A dead thing can go with the stream, but only a living thing can go against it." --G. K. Chesterton