I'm thinking of losing my temper and screaming at my doctor's staff
You do understand that that is extremely rude.
Yes, but they aren't giving me the attention I need.
Being angry because you're not being treated well is understandable but that doesn't mean you should yell at them for it. Yelling is usually our first response when we lose our tempers but that doesn't make it right. Try to get their attention by telling them that they aren't treating you well enough instead.
I should never have gone here, I should have known I could never trust the doctors.
Why don't you trust doctors? Doctors are trained to help you. They have every good intention to do so.