hi i really need someone to answer me, my periods been coming on every mth. for a good 3 months.and always came on on the 10th. i have also been having unprotected sex,this month no show i am 4 days late and i have been going to the restroom more often, and my bladder fells heavy at times.Also my breast be very tender when i take off my bra ,it feel almost like how it would feel to be coming on your period.and also lower stomach pains . what could be the answer can some one help me out. I've taken a pregnancy test it came back neg.