Aww yes, antibiotics do cause yeast infections, because not only do they kill the infectious bacteria causing you to feel sick, but they also kill off the bacteria that normally live in your body — in this case, the bacteria that would normally prevent you from having yeast infections. If you haven't mentioned this already to the doctors, then perhaps you should — it's possible that other types of antibiotics will not necessarily lead to yeast infections — honestly, I don't know. I'm not sure why they would prescribe so many types of medication though — perhaps the others are symptomatic treatments. At any case, an antibiotic should be all you need against a bacterial infection like this.