My pains didn't start to go until about flush 12. My enthusiasm started to wane after number 11 but the group kept me going and I also did a parasite cleanse which I found very beneficial. Not until flush number 20 did I get the gallbladder to fully contract and expel the dregs. Number 23 was finally clear and I am doing number 24 tomorrow night.
I think you may have to stick at doing the flushes and consider increasing the amount of potion slightly to take account of improving biliary capacity.