Empty Mirror-?

“GAH!” I breathed heavily as I sat up. I placed a hand to my chest. “Just another nightmare...” I got up and dressed as I ready for school. I bound down the stairs. “Morning mom!” “Good morning dearie-” She looked around the kitchen, seemingly searching for my voice. “Kadence?” “I’m right here mom! In front of you!” She looked toward me, but like she was looking through me. “Wow.. I must call my doctor. I’m halucinating!” I felt tears jerk in my throat. Halucinating!? I raced up to the bathroom. When I looked in the mirror, I didn’t see anything. “A-am I dead?! Am I a vampire!??” I ran to my dad’s study. “Father!” He turned around “Yes Ka... dence?” He tilted his head. “Huh, she must be in the other room.” He stood up and walked right through me.

What is happening to me??