I am on birth control and have been for about 6 years now. I am 21 and am always clockwork. however for the first time ever my period is a week early and at the beginning there was a kind of chunky brown discharge.

Recently i have started to work out more as i am trying to shed some unwanted weight. To aid in this i started taking green tea diet pills. Could these pills be the cause of the early period? i am confused because the research i have found says that green tea is prescribed to help regulate periods, but is the green tea diet pill a possible cause of this. If i'm early is pregnancy a possibility? or is it more than likely the pills.

My boyfriend and i have protected sex and like i said im on the pill, however since i began taking these pills, about a week ago, we have not had sex while on them.

any info please!!!???