Strep b/GBS

I’ve been put on antibiotics twice in past 3 months for overgrowth of strep b/GBS and I am not pregnant or am trying. I’m currently on clindymacin to help clear it out since I was having symptoms of a UTI from the strep b bacteria but I don’t seem to feel any better while taking the antibiotics. I’m curious if anyone has gone through something similar to me with this strain and not being pregnant. I also take a daily probiotic and wonder if d-mannose would help me but I know that is typically only used for E. coli strains.