Hi, it looks like this was posted quite a while ago, based on your symptoms, I would say you most definitely have parasites and should do a cleanse. It is a common misperception amoung Americans that parasites are rare. In fact, most American do have parasites due to their ignorance on the subject. Check out humaworm for more info on the subject. Alhtough I have not tried this cleanse, it has come highly recommended to me, great testimonies on the site as well. I have tried Intestinal Freedom by American Biologics, and is very effective. I recommend taking 2 capsules once a day with plenty of spring or mineral water for 1 month. This will catch the parasite(s) in every stage of development. Also you should get some probiotics to replace the intestinal flora. Since you will be flushing out all the toxins, parasites, build up etc, you will need to replace with healthy microorganisms.