Hi, I am 12 weeks pregnant, found out I had urinary tract infection due to E. coli . I ve tried to treat it by drinking a whole bottle of pure cranberry juice, sugar free... About 35 fl oz in one hour. This led to serious diarrhea and since then, I ve had some strange looking diarrhea that is powdery looking and black. I ve had no pain. Should I be worried or is it normal for cranberry juice to give some people black powdery diarrhea?