I don't mean to pry, but an important piece of information is do you get these bladder infections after sex? If so, then there are many ways to help to eliminate or at least severely reduce the number of uti's.
In general, regardless of the cause of the uti's, you might want to try frequently cleaning the genital area with alcohol or disinfecting wipes. For a lot of women, simply bathing each day and washing like normal just isn't enough to prevent bladder infections. I've had similar problems of frequent bladder infections, although not nearly as bad as yours. I usually get about 3 to 4 a year.
Your doctor can also put you on daily antibiotic treatment. You might want to discuss the possibility with your doctor. Obviously, it would be wonderful to be able to discover the medical cause of these numerous bladder infections, but small doses of antibiotics taken daily can prevent those infections from occuring, making you much happier.
Hope this helps!