I am so sorry this happened to you. I would have freaked out, too! How Scary!!!
It is good that it is getting tested. There was a kid a few years ago who woke up because he felt something brush past him. Turned out it was a bat. But because he didn't see of feel a bite he didn't go to the doctor or get it tested. He ended up dying because by the time he had any symptoms it was too late.
You can never be to careful. I sure hope it tests negative. I have heard those shots are not fun at all, but better than the alternative I guess.