GOD DAMN IT

WHY DOES IT HAVE TO BE SO HARD TO FIND MY TIDDY SIZE??? I MEASURE, AND I MEASURE, AND I MEASURE AGAIN! FIRST IT TELLS ME IM A C, THEN IM A D, THEN IM A GOD DAMN AA??? I JUST WANT A BRA THAT FITS AND DOESN'T MAKE MY BOOBS LOOK LUMPY,  WHY IS THAT SO HARD!?