I spoke to her later in the day (when I was much calmer) where I explained where my anger was coming from. I pointed out again that she's been spending every weekend since BD and I have never made a stink about it. I ask for one day, and it creates a mess.
I also apologized for some of the things I said and told her that I personally recognize that I sometimes use words as a weapon (e.g. passive aggressive remarks). I told her that it is something I'm working on to improve about myself.
She replied saying that she doesn't mind me taking time off and agrees that I need some time off.
She validated by saying that everyone needs to make improvements in their life, and that she thinks that I'm right on about my own assessment.
It turned out that she had a change of heart on her original idea to accommodate the scheduling conflict. That's where our fight stemmed from.
In the end, she stuck to the original plan and now there is no conflict.
M: 15 years BD: 6/25/14 EA/PA: starts 5/14/14 11/30/14 - A ends 5/15/15 - D is finalized. 11/28/15 - Start of new LTR with a wonderful woman (and still going strong)!