Dear SoSmall,
I found with my own childhood wounds, that it is easier to heal and make sense of things when I am in an environment where those wounds are not being triggered too often, at least in the beginning. If I am being triggered too much, I become `flooded' and then look for relief from the pain, which becomes a distraction from healing. Thats why I think its easier for me to start with somewhere safe.
Relating that to you, where your childhood wound relates to the pain and shame of experiencing disagreements, perhaps you could nurture yourself by seeking out people who share a lot of your views, or even find a role where you are the teacher? Obviously, in the long term that would be limiting, but to begin with I think this would have a settling effect on you.
X Bella