Well, I was going to say I was jealous but now I'm not. That effing sucks. And I say this because I was in Hawaii last year and on day 4 I started cramping really badly and started bleeding late that night, to the point DH had to go to the store and buy 'pons for me. My first period in something like 4 years, post-surgery (well, a cyst ruptured so it wasn't really a period but same thing. Girly parts flowing red.) Beaches and vacations and periods do.not.mix.
I'm sorry. Maybe it's a one-day aberration and it'll stop until it's supposed to start? Here's hoping.