im 21 years old sexually active with 1 person, my boyfriend who is now away at boot camp. he was home for Christmas from the 20-3 of January. i was due to have my period on the 4th of January. i didn't get my period until saturday the 7th, im on birth control and have never been late more than a day. i have never missed a period either. once i had started on saturday evening it was real dark red and a very lite amount. i continued to bleed and it would change from really dark to very pale pink. yesterday i stopped actually bleeding and now im spotting dark brown. whats wrong with me?