A good start
It's a nice story. I have some problems with it though: here they are.
Read the story now
First, I think you're going too fast with the story. Describe more, give more details about the story. For example, her best friends get mad at her, and the next thing you know Jayden is telling her to let them go. It's good advice, but new friends don't usually be so negative about your old friends since they don't want to make you mad. You should give it more time. Again, she is very casual about killing the doctor. If you mean to say that she does not mind being a vampire and killing then fine, otherwise you should describe it more and help us empathize with her. And the thirst, describe it more, describe the feeling instead of just saying the thirst, it makes it more effective. Same for the sun, since it's better not to assume that the reader already knows everything about vampires.
Nice story though, look forward to reading the rest.