My sister is 38 years old and has been having some serious problems. About 3 years ago she started having spells of almost passing out. The spells were about 3 months apart and have gradually been getting closer together. She now has several a week. One time she actually passed out and fell and busted her face open. The spells come on very quickly at different times of day and night. She gets very sick in her stomach, she feels like the world drifts away from her, she starts spitting a lot and doesn't know anything that is happening for a few seconds and then it passes. They have checked her brain, her heart, done all kinds of tests and can't find anything wrong. She also had sugar in her urine at a recent drs. Visit but the next time it was normal. Does anyone have any idea what could be her problem. She isn't able to drive or do anything because she is afraid she might pass out. Please, someone help us!