It's time's like these that our friends here on the BB are so important and such a source of strnegth.
You are so good at providing well reasoned and calm advice for others and now you are finding yourself in a spot where you could use a little 3rd party advice. We're both lucky to have Gabe as a friend. I know that he has straightened out my thoughts on more than one occasion. He has some good advice here for you.
What about trying the 24 hour rule, as Gabe and I have learned it? That is where, when you feel like you are at an emotional pitch and want to take a drastic action, you sit back, take a deep breath, and wait 24 hours, or 36, or 48, or whatever to calm down, clear your thoughts and give yourself a better chance to make a rational analysis and decision about what it is that is bothering you.
I glanced through Gabe's post and maybe he already suggested that approach, but it's worth considering regardless.