U can take a pill w/in 12 hrs of when u normally take it, if its after that it will not do any good. If u do find this pill after that time period, no need to take more than one. If u are worried planned parenthood I think can give you just the pill u lost. U may want to check with them. If u miss this pill you shouldn't have unpro. Sex for at least 7 days (some docs say 14 days).

This same thing happened to me! They told me not to take tomorrow's pill and end the pack one day early because it would be the same (missing the pill the last day). They told me not to worry and to continue taking it normally, but to have protected sex with a condom or some other back up for a week, I heard this from 3 different clinics. That was like 2 weeks ago and so far so good.