I clicked facebook "like" in porn site, what to do?

:( So I'm just a normal average guy, I was watching porn on my computer late at the evening (like many guys do), and I opened the wrong video (it was really, really horrible and sick, including some gay midgets and... very sick stuff), and while trying to close it as soon as possible, clicked facebook "like" button which was by the window (yeah, this is one of these few porn sites that place that button for whatever reasons). And I did not notice it!! I checked my facebook only late in the day after, and, well... At first I was "omg, what's the fuss about?", and then I found out... My "friends" quickly shared this, posted comment, wrote on my wall, so that everybody would see. Even my parents saw this, and I think one of teachers in my school also saw it...

Of course, I "unliked" it as soon as I could, tried to delete all these wall posts and everything, but the situation is damaged beyond repair - EVERYBODY knows :( And the bad thing is that that video is sick beyond words. At least if I "liked" some real quality video, I could say to anyone who laughs, like "so what? Everybody watches porn, and I watch the good stuff!" But now, I made a reputation of some weirdo :(

Please help? How to undo the damage? Whole school is talking about this, my parents want to disown me :(