I keep having the same dream about being chased?!?

Lately, everytime I take a nap or go to sleep I have the same dream of being chased, running, or hiding from either "hungry zombie humans" or an infection of blindness. Creepy, I know. It been going on for a couple nights now and its actually scaring me to go places (that were in the dream). WHAT DOES IT MEAN AND WHAT SHOULD I DO? I need some sleep! =/