i am 16 years old and my boyfriend and i only used the withdrawal method. 3 months ago i started to be extremely sick and naucious and i had headaches nonstop which isnt normal for me. i thought i was just coming down with something. then my period wasnt normal (light pink and brown in color and short) and i was tired all the time and having cravings for food all the time. i took a home pregnancy test and it came out negative so i dismissed the idea of pregnancy. 3 months later and my period is still light pink and brown and very short and light and my stomach looks swollen in the area below my belly button which it has never been big there before and im still tired and getting headaches and alot of other pregnancy symptoms. a few days back i took another at home pregnancy test and it was still negative. could i still be pregnant and the test just isnt detecting it? if not then what on earth else could be wrong with me?