last period was on august 24 & had sex around sept 3 everyday for 3 days. A few days later I started having to urinate more often then a few days after that I started to have lower back pain, my breast were hurting, light abdominal cramping, headaches and all this is VERY unusual for me because I never feel this way. this was about 2 weeks before my next period & I usually only have breast pain & feel bloated about 3 days before my period not two weeks. Then a few days before my period was supposed to come my veins were VERY visible on arms & breast & then on the day my period was supposed to come it did. Before my period comes I usually have a lot of vaginal discharge but this time I had nothing. Why did I feel all this but then got my period ? Can I still be pregnant ?