OMG is right! Woo-wee, girlie! Yikes.
I have no idea what you could have done - but you could start healing (?) by keeping that ankle raised..put some ice on / around it, and taking ibuprofen. Try to walk as little as possible on it. You don't need to ride any more this week anyway since you should be tapering before the ride.
Do you have any compression bandages? (ace?)...
Remember RICE - rest ice compression elevation
Keeping my fingers crossed for ya!! Its possible you could heal up and be fine! Maybe even super-fine!
2009 Giant Avail Advanced 1
2008 Trek FX 7.5 (Commuter)
Baby Blue..retired to new rider: 2006 Giant OCR-C