Heather,
Could you have actually had the flashback in the form of an emotional flashback? I've heard of "emotional flashbacks" in which you get the feelings, just not the "why" behind them. Perhaps you are now processing and experiencing the terrible emotions that you repressed in the past during the time surrounding the abuse. The lenghth of time you are taking to process it would suggest that something surfaced or that what did surface is enough for you right now, as you said, that you can't handle more than that right now. Take it easy on yourself. There's no point in judging your reactions and what you are going through is your healing journey for you, for your spirit; you can do no wrong in processing those feelings. I feel for you and know the darkness of what you feel. Don't push it away but realize it is an emotion, like a wave. The wave may wash over you, but it is not you. It may knock you down or move you to a new place, but it doesn't control you beyond that. And you can control how you will use it. Like a surfer, you can move with the wave and use it to get where you want to be. Take care and know that we are supporting you.
XOXO Muse