I totally relate to the wanting to run and feeling like I was going to throw up. The sad thing is that the abused child that you "were" is still living in those emotions .. trapped in a way, until you are strong enough to talk about it and convince your child self that (s)/he is safe now. I even had to do a visualisation and go back to my childhood and invite my 4 year old to leave and come with me. She took my hand eventually. It took a few tries. And I probably have to do it again with a younger child.

My thought is to listen to your insides, guts, intuition...whatever you want to call it. There is a part of you that will be able to tell you if you are going too fast or if you are ready to talk about it. You might consider non-dominant hand writing and ask yourself if you want to talk about it and see how you respond. If you afre not familiar with inner child work this might seem crazy, but it is extremely productive. You might try drawing the abuse scene or just colors representing your feelings about it, or writing words...like word association...just let the random words come and include anything...words which name feelings, sights, sounds, smells anything that comes to you associated with the event. This all might be a more gentle entrance into describing the abuse.

And if you sense it is too much, make sure you have some good "grounding" skills and "containment" processes that you can use to put it aside safely. Ask your therapist about these terms if you are not familiar with them.

Sorry if this is to much at once.