Yikes! We have an emergency, all-night vet the next town over, whom I would call in your situation. I found mine by calling my regular veterinarian's number late one night, and they gave the number. Is there any such thing in your area? You could try what I did, or check your phone book.
My local one would be long-distance for you, (it's in Needham, Massacusetts) but just in case you need to talk to someone and can't find anyone out there, their number is 781-453-0143.
Head injuries in people can be serious, but I have no idea what signs to look for in kitties!
Poor kitty, poor you, I'm gonna look online and see what I can find for you.
Bookmarks