I'm not a vegetarian or a vegan. I'm a meat eater. So, I am probably part of a minority on these boards in not believing that meat eating will cause the world to end. I'm a Price-Pottenger, Nourishing Traditions type of gal.
So while I'm addressing the vegan / raw foods type of angle I myself do not follow it. I do pay attention to everything that I have written about/given short cuts to here, but within the context of a meat based diet.
I do hope that you find that some of this might help you. I just wanted you to be aware that parasites could be part of the problem, but so could a couple of other factors.