I've had a chance to read your posts, so have a fair idea of your circumstances -and the practical help you have offered here to others. Life has been truly horrible for you in your younger years and I personally think you have done a marvelous job. You may consider yourself 'psychologically fragile' however I'd disagree.
Anyone who has battled all the symptoms as you have, has forgiven your abuser and contacted him - frankly I would have been surprised if that did work out as he most probably would not have changed. I also would have been very worried you might have 'slipped back' to some extent if it had the association kept going.
Your ambition to have a career in the Trauma area may be good or bad for you, I've no idea. I suspect the former, my experiences have helped me help others, and that has in turn strengthened me. I do know your experiences will give you exactly the insight your potential clients might need.
Now I'm unsure what to say about overcoming an addictive behavior becuse I do not know the particular problem you are talking about. You have mentioned everything from OCD to night terrors , so really it could be anything from self harm to seeking enclosed spaces to temper. All I know is as children when threatened long term we adopt habits that may seem (often quite wrongly) to offer a modicum of protection or at least stability.
Unlinking that association may not be that easy, but I'm sure with your determination and perspective it is doable.
It may be difficult for you, and I'd not encourage you to talk more than you are comfortable with, however if you felt like saying more perhaps others many have the same, you never know.
My problems started in adulthood and I'd suspect my issues may be different.
If you would like to come back and say more you can be sure of understanding and care.