So sorry you are so stressed about the impending conversation with your ex. Keep yourself level headed while talking & try your hardest not to react, easier said than done...I know. I have learned that sometimes we gotta take the high road with these exes.
As for you....drinking will not make the problems go away. It will make them worse. Stay the course, post here if you have to. Don't let the triggers get the best of you, you are stronger than that. (((hugs)))