Every once and while i get these real bad sweats then i get real weak i sometimes vomit and pass out while i'm passed out i start twitching?

See your doctor: Your symptoms may be signs of something significantly wrong. One cannot tell without a complete history, physical and possible lab/imaging tests. Follow with your doctor as soon as you can. This could be a seizure disorder.

Seek help: This could be caused by many conditions. For example, a seizure, cardiac event or possibly an anxiety attack. Please call your doctor or go to an emergent care facility for a complete evaluation.