Dean and your mom had seperated years ago; you'd been living with your mom in California since then- until now, that is. This past year you'd moved in with your dad instead- since your mom wanted to travel with her boyfriend (your stepdad). So, you'd packed your bags and moved to Kansas. It wasn't too bad- besides the miserable weather, it was quite peaceful as opposed to California. Less people. Your dad was a mechanic/part time ghost hunter- a crazy mix, I know. It was apparently some Winchester family business- your uncle Sammy, who you saw almost every day at your dads house, was involved in it too.
However, despite you knowing all about the supernatural world, your dad tried to sheild you from it as much as he could. It was a dangerous buisness. Your gradfather, great grandfather, grandmother and your uncle sammys collage girlfriend had all died because of the supernatural world. Your dad, Dean, had even gone to hell- literally; so he wanted to make sure you never got involved with hunting.
Though, it wasn't easy. Many entities hated your uncle and Dad, and wanted to see them suffer. Last year, you'd had a boyfriend. You were young, stupid and inlove- which naturally made you blind to the fact that he wasn't human. He targeted you because you were a Winchester- and no Winchester could have a normal life. You hadn't noticed at first; but a few months ago he had lashed out when you'd accidentally cut your finger- and he'd bit you. He damn nearly turned you into a vampire too, but thankfully your dad had shown up on time- driving him away. It was a struggle- you'd been in hospital for a few weeks as you'd got seriously hurt in the fight- breaking a few bones. You hadn't seen him, or any vampires, since then- but that doesn't mean you weren't suffering.
You'd been having nightmares everyday now. Your dad had fallen asleep on the couch, watching tv, but he awoke to the sound of screaming. He sighed. You kept reliving the pain of being bitten. He stood up and made his way to your room, opening the door as you screamed, wailed and cried into your pillow. "hey, hey...cmon..." he says tiredly, softly. Trying to wake you.