At my annual checkup (about a month ago) my gyno said I tested positive for Group B strep.  Im prone to yeast infections because I always have sugar in my urine, so I thought that maybe Ive been getting a yeast infection, but today I had a dark watery discharge that smelled really bad.  No pain, no itching, just the one bout of discharge and a continuous foul odor.  I started birth control about a week and 3 days ago.  What could be the cause? Could it be Group B strep related?
Thanks for posting your query to Chat Doctor. Streptococcal infection do not cause foul smelling discharge. But associated infection along with Streptococcal infection like Yeast infection, Trachomas infection or some other parasitic infection may cause foul smelling discharge. If you are having persistent discharge with foul smelling, do for examination of your discharge for Microscopic examination to Microbiology lab to know type of infection .then your gone surgeon will be able to treat you accordingly .take care,