my husband has bad bleeding spells about 4 to 6 weeks dr has done different tests , colonoscopy,then upper GI with BARIUM and CONTRAST,,come back to day gall stones,,now waiting to see dr end of the month..can gall stones cause EXCESSIVE BLEEDING ,the GI showed nothing else,,should we be concerned and see a specialist or what should we do,, iam very worried about his health,, hes losing weight