There are several forum posts and opinions voiced by people who have claimed to be real vampires. I hate to be the one to tell you this, but you are not a real vampire. Or, at least, you are not a vampire in the sense of mythology (which includes Twilight).
Biologically, you are a human. You cannot ever change that, sorry. This is because there is no other humanoid species in existence today other than Homo sapiens. The closest a human being can come to a "vampire" is forcing themselves to drink blood, which is a very bad idea (I'll get to why later).