I've been having a lot of bloating, burning in my upper abdomen... Nausea and back pain I lost 15 lbs in the last 4 months without trying and I wake up sweaty. I've had my gallbladder removed in 2006, a ectopic pregnancy, then a hysterectomy (which they found endometriosis) , gastric bypass (2014)then had pancreatitis a month after that surgery. My father currently has cancer and out of my grandmas 8 kids 5 has passed from cancer (2 stomach,liver,lung,breast) so i scheduled for a endoscopy but my doctor doesn't seem concerned at all.