If I may mention...after you're done with the antibiotics you should take a probiotic supplement that will replenish the good bacteria in your body that the antibiotics killed. Probiotics are good for the colon, digestion, nutrient assimilation, immune system, keeping bad bacteria in check, etc. It's also very important for vaginal health.
I don't know why most doctors don't tell their patients, as if you ask them they'll probably say it's a good idea.