1 year of unprotected sex

We started having unprotected sex March 23rd 2016 and now it's April 11th 2017. I haven't become pregnant. I'm 17 so being pregnant isn't what I truly want and you can saywe've been playing with fire but I'm kinda worried that I'll never get pregnant. The days we've had sex I look to see if I was in my fertile window and most of the time I am. We have sex a lot 5/7 days mostly and have for a year.