hi everyone!

I’ve been on my birth control for a few years now and always had a regular period schedule with it along with taking it every single day. today, i went to the bathroom and noticed that i got my period. today is friday and i don’t get my period until monday or tuesday on the WHITE pills. i have unprotected sex with my SO as well. i have the normal period symptoms along with a heavy/regular flow but this has never happened to me. please help i need answers.