Must i drink nordette (ethinyl estradiol and levonorgestrel) same time and if i miss it and after three hours can i still take it?

Timing birth control: Birth control pills should ideally be taken at the same time every day. Combination pills consisting of both an estrogen & progestin allow for some leeway while you can't be more than 3hrs late w/progestin-only pills. Check out http://www.plannedparenthood.org/health-info/birth-control/birth-control-pill & http://plannedparenthood.tumblr.com/post/23827960518/timing-of-birth-control-pills