Why has my period not arrived?

SimplyDreaming • I just want to tell you that everything about you isbeautiful. I love your Soul I love your Personality I love your looks. I love you. I`m paige, A fifteen year old Just happily tracking my period!
I'm rather worried in case something is wrong. My period is about a week late and there's no way I'm pregnant because I'm a lesbian and not sexually active at the moment. However I did overdose the last time I was on my period...I'm just worried because there's no blood but enough pain to make me unable to walk and I keep going dizzy...someone help?