3 WEEKS LATE FOR MY MONTHLY

HI I AM ALMOST 3 WEEKS LATE FOR MY MONTHLY, FOR THE PAST 5 DAYS MY BREAST HAVE BIN TENDER MY BF AND I HAVE SEX ALL THE TIME BUT HE IS FIXED AND ALMOST IMOSSIBLE TO GET PRG I GET A SHARP PAIN IN MY BLADDER WHICH MAKES ME WANNA GO TO THE BATHROOM RIGHT AWAY MY DOCTOR SAYS THAT I AM NOT PREG BUT MY BELLY KEAPS GETTING A LITTLE BIGGER , I HARDLY EAT AND AT TIMES I JUST GET WAY TO OVER HRNY ROLF SRRY FOR THAT INFO BUT IDNO WHAT I AM SUPPOSED TO DO. SOMETHING ISNT RIGHT AT ALL AND I CAN FEAL IT BUT NO ONE SEEMS TO WANT TO HELP ME I HAVE BIN GOING OT MY FAMILY DOCTOR CONSTANTLY AND GOING OT THE HOSPITAL AS WELL. CAN ANYONE GIVE ME AN ANSWER? I JUST WANNA KNOW WHATS GOING ON WITH ME.