Once I go to sleep

I have had this paranoid thought for awhile now that once I go to sleep that sometimes I wake up and do things but have no recollection of anything. I had never had any proof of this besides paranoid about things out of place. Until last night I had trouble sleeping and only fell asleep for a couple hours but when I woke up I noticed I had applied to several jobs. Has anyone else had this happen to them? Or is this even possible to happen im not sure what to think right now