47 years old. 85 lbs. Started taking Ultimate Flora Critical Care 50 billion Probiotic on December 11. Had sardines last night and a resee's cup about an hour ago. Just had a bowel movement and noticed the 2 small firm stools were completely black and a long stool was 1/2 black with the remaining being a light colored brown. The remaining stools in the toilet bowl were all that same light brown. I'm also taking Geritol plus iron but haven't taken in 24 hrs. Concerned if I have a GI bleed also due to my bottom lip being white and peeling despite me drinking lots of water?