HELP PLEASE!!!!!

:unsure: I AM SO CONFUSED…ME AND MY BOYFRIEND LIVES TOGETHER AND WE HAVE BEEN TOGETHER OVER A YEAR NOW. WE ALWAYS HAVE UNPROTECTED SEX AND HE ALWAYS CUMS IN ME BUT I JUST DONT SEEM TO NEVER GET PREGNANT:( WHY WE ARE TRYING TO CONCIEVE AND WE HAVE BEEN HAVING SEX FOR OVER 8 MONTHS NOW..BUT HOWEVER I ALWAYS SEEM TO GET SOME SYMPTOMS AND THEN THEY GO AWAY I DONT KNOW IF THEY ARE REAL SYMPTOMS MAYBE ITS ALL IN MY HEAD I DID THROW UP LIKE TWO WEEKS AGO AND IT CAME OUT GREEN!!!!:sick: BUT I WOULD LIKE TO KNOW FROM AN EXPERIENCED GIRL WHO IS PREGNANT OR WAS PREGNANT IF THEY EVER HAD TWO PERIODS IN ONE MONTH……DOES THAT MEAN I AM PREGNANT???IS IT IMPLANTATION BLEEDING .BECAUSE MY BLOOD IS DARK RED THIS TIME..I NEVER HAD TWO PERIODS IN 1 MONTH BUT IM CONFUSED IF IT IS IMPLANTATION BLEEDING BECAUSE IT FEELS LIKE A PERIOD AND I HAVE CRAMPS BUT THEY WILL GO AWAY AND THEN COME BACK…SOMEONE PLEASEEEE HELP ME I THINK I OVULATED AROUND THE 22 OF THIS MONTH I GOT MY FIRST PERIOD ON THE 4TH OF THIS MONTH AND NOW I HAVE ANOTHER ONE THAT STARTED YESTERDAY???WHY TWO PERIODS MY PERIODS USUALLY COME ONCE A MONTH AND IN JANUARY I GOT IT PRETTY EARLY BUT IT FIRST STARTED AS A BROWNISH COLOR…I AM KINDA TIRED LATELY AND I EAT ALOT…I HAVENT ANY SIGNS LIKE VOMITTING OR ANYTHANG BUT LAST WEEK MY BREAST WERE TENDER I WOULD LIKE TO KNOW WHAT IS THIS BLEEDING IS IT A ACTUAL PEIOD OR WHAT AND I WOULD LIKE TO KNOW SHOULD I GO TAKE A TEST