Lashay, 17, can't hold down anything she eats or drinks. But negative interactions with previous doctors leave her family leery of the crowd's advice.

Matt, 20, experiences fainting spells that stop his heart, each one preceded by a sense of déjà vu. But is the issue with his heart -- or his head?

Two very different people are desperate for a diagnosis to their unexplained paralysis: textbook "good patient" Joe, 61, and more skeptical Ann, 44.