You were turned a little under a year ago. Philza had found you, abondanded, already getting a fever from it all, and taken you in. The thing was...

You had no idea you were a vampire.

You were taken in by the nice family, and they figured it might be best to not tell you you were a vampire. So, instead. They just kept mixing blood into meals and drinks that you had, so you'd still get the necessary stuff for being a vampire, but also not freak out.

But it was your birthday, and right now in the mirror.... Nothing had changed. Vampires age by 100 years. 1 year to vamp, was 100 human years. You were still the same age as when you were turned. But the thing was, when you didn't know you were a vampire, you're the same height, nothing of your face had changed.

Everything. The. Same. So of course you were confused.