I m experienceing right upper quadrant discomfort with rebound. Medical HX: cholecystectomy, Hysterectomy, Colectomy, CMV, autoimmune Hepatitis, Barrettes Esophagus. Had an EGD and sigmoidoscopy 4 weeks ago and don t have a follow up with gastroenterologist until 2/16/15. Should I go to ER?