hi, i was wondering if it is safe for my girlfriend to 'skip'her period by taking the next set of birth control pills, we've never done it before, but were thinking of doing it because her period will fall on our vacation week, and well, neither of us want that!is it safe to either start the new pack? or to take just the last week of pills (the strongest ones) to stop it for a month/week....let us know asap please!