I had a similra pain even prior to my 1st Flush, where it felt like I couldn't expand my lungs, and the pain was constant and sharp-5 days.
What helped me was applying a hot Castor Oil Pack to the R/ribcage area, the pain lessened and finally stopped, after about 2hrs of application (I didn't know about Epsom Salts at the time).
Your liver is jammed up and the stones are moving down from different areas, it sounds like. I would wait about a week and flush again.
Meanwhile, castor pack and 1 Tbs of Epsom in glass of water should do it.
Hang in there, it'll get better as you keep on flushing.