How to postpone period?

My period is due literally the day I leave for vacation next month (a romantic trip with my boyfriend). Any tips for naturally postponing my period? I don't take birth control, so skipping placebos isn't an option. I'm also NOT about sex while on my period...I feel 0% sexual when I'm bleeding. I read before that extra nipple stimulation can help (it worked last time this happened) but I was wondering if anyone has some other magic solutions?