Prevent GBS?

Any mommies ever hear of any remedies to prevent a positive GBS result? My doc says there's nothing I can do, but the Internet (oh, trusted Internet lol) says to eat a diet high in probiotics and garlic lol. Worth a try? I have 1 week until the test and am really looking for that negative! Who wants to be on antibiotics during labor!? Ain't nobody got time or money for that!! :)