I'm not Doc, but I've been almost all the way thru his program. Doc will want to give you his own answer to this. Here's mine: You WILL get stabbing pains in the liver. It's stones moving down to the bottom of your liver. You might get reflex pain like you describe. Doesn't mean things are not going well and that you should stop the flushes. What I used that helped so much with this in the beginning is Barefoot's liver/gallbladder BALANCE. It keeps the liver open. I also used the Edgar Cayce castor oil packs. That stops a lot of pain and helps with inflammation. Liver flushes only serve to get those bugs, stones and nasties out of you. They will help you get your health back BIG TIME as you clean all that junk out. It may take some time. That's what the old veterans of Doc's program are here for--to help you get thru this. ;-)). Stay calm. I think you're doing OK.
EDIT: I see you've been on here for 10 months. How far apart are you doing the liver flushes? Needs to be 2 weeks as a general rule. Stayed on the dewormer for this length of time? I hope so. Otherwise you might have run into problems with parasites multiplying back to their original populous. Gotta stay on preferably Barefoot's dewormer for the rest of your life, but that's for maintenance. I've stayed on it every day for the 19 1/2 months I've been doing this program. Won't hurt and makes sure the bugs don't come back. I had to do the flushes pretty close together like on the average of every 3-5 days. Maybe you are having pain because you need another flush and you are not doing them when you need to.