It's not that "they don't know what to do", it's that they get punished for further investigating into subjective symptoms when the tests come out all negative. Do you think procedures are free? Do you think there's no overhead for doctors? Do you think doctors don't get called into "meetings" where they get reamed by their uppers for doing what's actually best for their patient?

Maybe you need to act in such a way that doctors will sacrifice their own jobs to fight for your health. It's just like how people treat prettier people better. Act in a way that garners more sympathy, and maybe someone will go out of their way to get in trouble for your sake. Just a thought.