about 4 weeks ago, i had unproteted sex but he finished off just on the Very outside of my vagina. im on the pill, but its the kind thats skips a week for you to have your period and that was the week we did it. in fact, it was on the second to last day of that week, so two days later i was taking the pill again for my next cycle. but the thing is, i got what i thought was my period, but it was 2 weeks too early! and it was brownish red, thick, and heavier than usual. i was supposed to start about 2 days ago and still havent. im now experiencing bad cramps in my lower back, queaziness, dizziness, bloating, sore and swollen breasts, runny nose ( not allergies), im peeing more than usual, and im very tired a lot. am i pregnant?