If you were that bad why didn't you go and see you GP?
I started having issues about 13 years ago and went to my GP who referred me to a nutritionist (employed by the NHS), got a food diary going and we worked out what I couldn't eat. Turns out it was wheat. I also had a few appointments with a specialist in London to check if my issues weren't symptoms of a more dangerous underlying issue. All free on the NHS...
I get the impression this area is becoming like the Chiropractor/Physiotherapist issue. One is essentially a quack that doesn't need qualifications and the other is a trained, regulated career largely connected to the NHS... Nutritionists and Physiotherapist work for the NHS, Chiropractors and Naturopathists(sp?) don't...
I appreciate the sentiment of your post, but that's totally wrong.
Nutritionist means absolutely nothing. Dietitian is a protected term, and they work for the NHS.