in my particular case, what i ran into was a doctor who accused me of having an eating disorder (anorexia) and a bug phobia after i worked up enough nerve to tell him that i couldn't gain weight because i had some sort of intestinal worms.
i was already feeling extremely vulnerable when i went in there, and he just pushed me further down the hole. i was too much of a coward to go find another doctor for fear of hearing the same thing. i did not have the internet at that time. i wish i had found this site earlier.