How do you deal with a UTI?

Samantha
I recently got a UTI (urinary tract infection) and I'm not quite sure how it works. I know that you get antibiotics from the doctor and you take them twice a day until they are finished. But then what happens when the antibiotics give you a yeast infection because of all the missing probiotics in your body? It just feels like an endless cycle.
I also just recently started dating this guy, and he seems to be very understanding of these "feminine issues", but I don't like having to withhold sex from him during the "can't get enough of eachother" phase in our relationship.