How to treat a vaginal yeast infection during pregnancy?

Anilag asked: I am on the 10th week of pregnancy and I have a vaginal yeast infection. My doctor has prescribed me metronidazole and miconazole nitrate. I read about the metronidazole and found out that it PROBABLY can be harmfull (birth defects). So, now I would like to know how harmfull can be the yeast [...]