No AF in 2mnths

I've never thought I'd ever want to see AF so bad,but last time she showed was feb.11 - 15 now it's April 29 and no show I've only had AF 2 times this year 2014 & I constantly get BFN been to the clinic numerous times and going tomorrow but all BFN one blood test BFN I'm eating a lot my breast are very sore and growing my stomach is just out there like never before I actually get asked am I pregnant from people and nieces and nephews. I'm always tired ive just got on birth control April 8  because dr said will help with AF. but these signs was showing before BC I need help because I think my clinic sucks. Any ideas?