If you had an ultrasound and it was proven that you had a calcified stone, 7 flushes is just not enough. It was also too bad that you did not start flushing at the beginning when you were doing the GCG. To get the stones out you really need the flush. I know people feel better with the GCG, but often they feel better with just ES too. All the herbs can't replace the flush.
I would say keep flushing but also do a bowelcleanse and after every few flushes a kidney cleanse.
I am symptom free though I still have a 24mm calcified stone. When the bile is flowing the liver and gallbladder heal themselves. Mine used to be inflammed, walls were 42mm, now back to normal 3 mm, stone was stuck in gallbladder neck and now free floating.
Just make sure you keep flushing every 2-3 weeks, don't skip when you are feeling well, wait till all stones are out for 3x and then you can go on maintenance a few times a year.
I also made adjustments in my diet.