well, i am 15 years old an dmy boyfriend and i have unprotected sex. i already told my mother about me missing my preiod. the time i got it , it only lasted about 9 hours throughout the day . i waited a week and nothing. so i took a test at home and it came out negative. but im always sleepy, i have mood swings, and i go to the restroom alot . i also get little back pains, and feelings you get when you think you'll start your period. i just want to know if i might be pregnant.