Probably a stuck stone because you tried to shortcut by not using the Epsom Salts . Try a couple of teaspoons in a glass of warm water now and see if that helps out after 40 minutes or so. No idea about the coloured stools. But really, you need to read Moritz's book he is emphatic about taking the ES (or equivalent) and preferably malic acid/ apple juice for a week prior to the flush as well to avoid this exact type problem. (I am not a doctor)