I didn't have diarrehia and nausea during treatment so I feel sorry for you. Can you check with your doc?
I did have very severe stomach cramps and diarrehia just a few days after I finished the course. By chance, I was driving to have colonics. I was so bad I thought I wasn't going to make it from the car park! I told the colonist and thought I should go home. She said she thought I should go ahead and have one anyway so with slight trepidation I did. It was extraordinary - I went from really ill to completely well in 1/2 hour. I'm telling you this because I wonder if that's how the drugs work?