Don't beat yourself up over one little slip up. Realize that even though you were a pain in the a$$ it was not the same old you, or even your same old W.
I see a lot of positives. First, you realized your behavior was unacceptable and were able to recover. Second, your W did not allow herself to be baited into the argument. You can't expect things to be perfect. You're still learning and need to practice how you argue a few times before you will be really be able to modify your behavior.
