It would be a good idea to visit a DR and make sure he does a test for Lyme Disease. A Metametrix Lab enteric panel will give you information on intestinal parasites, bacteria and yeasts. If you notice brown 'coffee grounds' usually floating it indicates you are bleeding from the upper intestinal tract and it is caused by a number of intestinal problems.
I have done many Liver Flushes and after getting out tangles of worms, many stones, going on a gluten free diet and using herbs for intestinal candida now only get out a few small stones or no stones and lots of sludge.