Funny that you mention this.. I've just begun HW 2 days ago and I'm experiencing the same thing... I'm getting pinching sensations in my liver area and in my spleen area - very bizarre. I'm all but convinced that these are parasites. I'm hoping this is a good sign and that the HW is really getting to them.
I have the same question about the liver flush. In past posts HW has recommended a flush at the end of the HW treatment. I couldn't find any posts where someone did a flush simultaneously with the HW.