Hi guys. I've been having abdominal pain, nausea and mucous in stools for three weeks now. I've had many blood tests - all normal. Urine and stool tests, ultrasound and now I am scheduled for a HIDA scan and a barium swallow. Can any of these detect stomach cancer? How is that diagnosed? My great grandmother had it and I am just wondering when is the point I stop worrying and chalk it up to gasteritis.