Even tho the scan did not show any stone but only sludge obviously there are stones since you have passed some of them. Breaking up sludge can be difficult as it seems to solidify and won't break up. Quite by chance an ND gave me a bottle of Cell Power made by Positive Power Nutritionals for general health. Even a small amount made me feel so ill I did not use much of it. Then I did a Liver-Flush and out came loads of sludge and stones. So then I would use a little Cell Power for a few days before doing a Liver-Flush and the gall system congestion improved greatly. You may also need to look up the various ways to improve bile production and the bile pool.
I have had pain on the left side from a parasite in the spleen and several times from a congested pancreas. The pancreatic duct and the bile duct enter the intestine side by side and are controlled by the same spincter muscle. When the bile duct is blocked or impeded it can also block the pancreatic duct and a person can develop an infection or a near infection due to bacterial overgrowths. Getting the stones and sludge out of the gallbldder and bile tubes relieves the congestion in the pancreas. Actual infections with a pathogen may need Antibiotic treatment.
Humaworm contains many herbs and can be difficult for some to tolerate. It would be better to use Clark's 3 herbs for parasites first and if you need to do more then go on to the stronger preparations.