Pregnancy negative, but doctor asked for scaning.. y so?

the doctor could be scanning to just check her uterus and ovaries.. i wouldn't worry about it until the doctor says anything. sometimes we don't have our monthly cycle because of stress or benign (non-cancerous) tumors that grow, and many other reasons. if it's already negative for pregnancy, chances are it is. False negatives on blood tests are low for pregnancy. goodluck!