Vampire in the Harry Potter World

Kai is a tourist on holiday when he is killed in a terrorist attack. He wakes up during the year 1981 in a forest and finds out that he is a vampire progenitor in the Harry Potter world. Kai then heads out to the nearest human settlement which happens to be Godric Hollow.
-This is my first time writing a novel so I will have mistakes, I'd appreciate it if you could point them out.
-I want to point out that HP doesn't belong to me.
-THE STORY WON'T BE GOING ACCORDING TO CANON! I will be introducing my own elements to the story.
-OOC Voldemort