Six-year-old Kamiyah will suddenly and briefly go limp dozens -- sometimes hundreds -- of times a day. Now the search is on to find others like her.

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?