When I starting BC, I also began my period. 8 days later(today), I'm still on my period. I am not my motivated self on my period. In fact I am very irritable. I also got so much weaker. I love to work out because it makes me feel alive, & the lack of testosterone was not helping me be happy. Today I didn't take the pill & I will never again. Hello fertility awareness. I honestly dislike birth control pills so much that I would convince my friends never to take them.