i don't have a source for alternative therapies for you, but i would think maybe drinking unsweetened cranberry juice, and lots of water, in addition to eating some raw garlic might help. i wanted to let you know too, i had a kidney infection about 2wks after having dd1. it was bad. i came down with a high fever (like 104) and severe back and abdominal pain within the course of only a couple of hours. we called my MW, and she wanted us to go to the ER immediately since it was late on saturday night. i had to get a shot of abx and follow it up with pills. the doc also gave me diflucan b/c i told him abx always give me a yeast infection. i felt better the next morning, and had no problem bfing dd1.
i know that's not the route you're hoping to take, but i just wanted you to know that even if you do end up needing abx, it might not be such a bad thing.