Yes, you are only human. You will become stronger each time you can hold your tongue. I get just as angry as you, and I feel your anger right now. It`s real. How can you over anger?
Set goals, the next time you talk to H, try not to mention ow. If you slip, try again, but remember how bringing her up makes everybody feel. You`re doing great by NC, that is hard for most of us.
I know how feeling like a fool feels like. It`s not foolish to love and trust your own H. Good wives do that, and that is something these WAS are foolish to lose.