If it's in your urine, it really needs to be treated conventionally, as it shows a large overgrowth and can lead to pretem labour. Probiotics may be beneficial in keeping it away, or stopping regrowth or colonisation of the vagina, but it does tend to be transient anyway. I personally would recommend a course of antibiotics to clear the urine, a retest, then use probiotics and possible garlic to help control it, and ask for a re-swab at 36-37 weeks. If it's clear, then campaign for no antib's in labour if that is what you feel as many Ob's will treat you as "once a carrier, always a carrier" but that's not strictly true. I was GBS+ last pregnancy but have not been so far this pregnancy, I am going for a swab in the next couple of days and if I'm clear my OB won't make me have anti-b's in labour, I've been taking probiotics this whole pregnancy too - I take ones with Lactobacillus acidophilus in them as that is the bacteria that is naturally present in healthy vaginal flora and produces a mildly acidic environment, which can prevent the "bad" bacteria thriving. Good luck!