So my boyfriend and I just had sex for the first time in a few weeks. We are on vacation and finally had the opportunity to get frisky... Anyways, I woke up the next morning (yesterday) and I was bleeding. I started my period. Almost a week early. And I am on the pill. I just woke up this morning to find the full-blown bleeding of day 2. (Since I was not expecting to start until I got back from vacation, I stupidly thought I didn't need to pack tampons or pads). Now I'm a little worried about starting my period early, while on the pill, while sex was obviously the thing that brought it on. Has anyone else experienced this? Any advice?