I can't Believe Kaiser did this to me....

WOW!, so finally I demanded all my records from kaiser (I no longer have them, thank god!) and I was reading through the 1000 pages I got and all the tests I had taken. When I first got sick with IBS and vomiting all the time I went to a gastro doctor and he did a ton of tests, endoscopy, and stool test. well he told me everything came back normal! he said I was negative for H.pylori and parasites. and sent me home with acid reducers. GUESS HE FORGOT TO SAY THE TEST FOUND "Many Yeast" under test comments from the lab. Thanks he ruined my life, if I would have caught this early at that stage It would not have gone systemic. I want to sue. what should I do? They did not test for what kind of yeast(I don't think theyeven have the ability at kaiser) so I don't know what type, but saying many yeast as a result SHOULD HAVE BEEN RELAYED TO ME! and treatment should have been given. I have lost 3 years of my 20's so far and I'm just starting to battle this.