I currently am on a 10 day antibiotic to treat

Patient: I currently am on a 10 day antibiotic to treat a sinus infection called doxycycline hyclate. I am also on birth control, which I started a new pack today (my 4th day of the antibiotic). I am aware that the antibiotic makes the birth control less effective, when will my birth control be fully effective again? will it be the entire month until my next pill pack, or only like a week after I complete the antibiotic?

Doctor: