I think you need to do another flush- soon- if you are still in pain. Have another flush in a few days if you are not in pain at this time.
If you are doing a flush right a way, make sure you drink plenty of water and electrolytes before hand. Make sure you have plenty of potassium and magnesium, especially: The flushes are strong and depleting.
I had pain with my first flush and when I checked my results, I found a very big calcified (hard as rock) stone that had been in my body for a long time.