(Nightmare!Sans x Reader) Can't Get You Out of My Head

You are a young girl about the age of 17. You are a bit short for your age. You have alot of friends and your family loves you. You have 2 demonic brothers that mess up your stuff and bother you alot and you also love to draw. In other words, you're the average teenage girl. The only thing ypu have problems with is the nightmares you have at midnight only you aren't sure if they are nightmares.