^If that doesn't work, I'd recommend looking at the registration dates at some of the other schools in your area. Some of them might still be accepting payments/exam requests. Most schools don't seem to mind if students opt to take the exams at an alternative location, so that might be a suitable option for you.
I don't think they would care too much to be honest.
^^Also, wow! You're teaching yourself two languages? That's awesome! I would say writing would be considered an ec once you got something published. Maybe you could try the Scholastic writing competition?
^I completely agree with you. I think that as long as you portray some unique aspect about yourself, you'll be fine. If one portrays passion in their ecs and demonstrates that on their application, it will exemplify a unique individual. Personally, I think that if individuals can show that, they will be fine:)