How long does breakthrough bleeding last after missing one pill of birth control?

i missed one pill last week (thurs) and took it as soon as i remembered (the next day) and then again at my regular time. i started bleeding a bit on saturday and am still, today is monday. i'm still continuing on with the pills as well. this is the last week of active pills then i should be getting my period next week...i wanted to know how long is this bleeding going to last? am i even going to get my period now next week?