Bladder infection?

could someone help me out?! i'm so tired of getting bladder infections (urinary tract infections)
i started getting them when i be about 7, and i get them consistantly until i was almost 12. at one point, my doctor told my mother i had twisted ureters, but i never hear anything else about it again, would that hold an effect?
i stopped getting them for a while, and then when i get to college and started having sex they come back.
i'm at the point where on earth i get one just about every 3 weeks, some aren't bad, and i lately drink water and run cranberry pills for a few days, but some get to the point where on earth i pee blood and can't stand. i'm allergic to sulfa drugs, so i can only help yourself to certain anti-biotics, but anti-biotics also mess beside my birthcontrol
as you can probably guess, i'm getting really tired of this, so is there any selection other than individual celebate or going to the doctor and taking anti-biotics every month? am i just a freak?
Answers:

A cross-examine about stopping my interval?

I had duplicate problem for awhile, then my doctor told me that it be probably happening from sex. So right after sex I trademark sure that I pee and I also clean my "area" next to a cotton ball and rather rubbing alcohol. It will burn a little, but I don't achieve infections anymore.

Will engaging too much within sexual intercourse affect the woman's menstrual cycle?considering she's not pregnant

Here's your solution:

Pee immediately after your own sex.

I had impossible to tell apart problem and after my doctor told me that, I haven't had one contained by years.

Ladies help plz raw ?

Probaly cause your bladder is especially sensitive and it gets infections confidently