I've Been Having Bad Bladder Infections Nearly Everyday For About

I've been having bad bladder infections nearly everyday for about a year now, I've never been to speak to a doctor about it as I'd become so used to having them that I didn't think there was anything wrong. I'm only 16 years old so it's started to worry me a little as too why I'm having them so bad at this age. I drink plenty of water and cranberry juice but nothing ever seems to help.