I'm seventeen years old and currently my period is two weeks late. Before you think low of me, I haven't had sex. I swear, I've never even had a boyfriend. There are hardly any guys I even talk to. My period was due about two weeks ago but it hasn't come yet and I'm a little worried. I definitely know that I'm NOT pregnant but I'm concerned that there is something else wrong with me. Does anyone know what it could be?