First Colonic

Hi,
I just had my very first colonic done on friday and I'm curious about a few things. The lady administering it kept flushing my colon but nothing was happening until I went to the bathroom. But then, I got very lightheaded and nauseated. (I'm sorry this is gross) I went back to the bathroom to vomit when I noticed that I had vomitted what I thought was feces--these two black looking things that very much stood out from everything else. I panicked and told the lady, and she asked me what I had eaten then she concluded that it was probably 2 parasites! Is this something normal during a colonic? If they were parasites, why did they look like feces? The lady assured me that everything was fine, but I am still pretty disturbed. I'm trying to start a cleaner way of eating, mostly vegetarian and leaning to raw, but I"m afraid of eating anything now because I think everything's going to give me a parasite.
I really need some help.

Thank You!!