Well its good that you know that you are acidic, that is a starting point. The parasites and the yeast "like you" because it is their job to clean up an acidic environment. Your job is to create an alkaline environment so that they are no longer needed. Go to the moreless forum and figure out exactly how to get alkaline and stay that way for a long time! It seems like you might have an uphill battle but what other choices do you have? You cant continue to try to kill these creatures because they are meant to live in acid, although you cant tell they are really helping you out and preventing much worse from happening to you. God bless you and help you through the tough times, you seem wise enough to get through this, just learn sooner rather than later.