need new wiring

I am going to install fan in the vent hole right over my bed. Its is an enclosed fan, with no fan blades exposed. Won't give me a haircut, just gotta remember to duck when I make the bed. Unfortunately, the vent is not wired for 2nd AC. So, power line will have to be run across ceiling to junction box in bathroom. I have the cover for the power line, I just don't feel comfortable playing with electricity.