Have period now, next one 19th, need to change it by a week , not on the pill, do have 21 day cycle pill from doctor, from summer what todo?

Cycle control: If you have two packs of a monophasic pill (all 21 pills look the same), then you can start now and take as many weeks in a row of active pills until it's safe to get your period again. This won't work as well with the triphasic pills. And despite our best efforts, sometimes people bleed while taking birth control pills, and there's nothing we can do about it. Good luck!