After a gastrointestinal flu with vomiting & diahrrea for 2 days,the diahrrea remains. It is now been 7 days with gassy,black,watery stools,even with diphenoxylate,2.5 mg 2 X/day,started on 4/16/15. My hemorrhoids are bleeding. My stomach is achy,. Diphenoxylate made me nauseous tonite and after 6 hrs , the diahrrea and gas is back. (veg. beef soup & crackers for dinner;cheese pizza slice for lunch). I am afraid I may have C. Diff or internal bleeding. (I have chronic back pain and take 1 Aleve/day for 10 months now. My Dr s apt is 4 days away. Should I see a Dr. immediately?