Itsy Bitsy Spider...nightmare?

So last night at about 3am I woke up thinking there was giant spider coming down from the ceiling. I jumped over (not up, cause I didn't want to hit the spider) woke Kyle up (cause I didn't want him to get bit) went carefully around where I thought the spider was and turned on the lights and looked where I thought the spider dangling... to my surprise it was gone. So of course I told Kyle to help me find it, we lifted up the covers looking for a bit, until Kyle said, there's nothing here, come back to bed and go to sleep, so reluctantly I crawled back into bed, paranoid that the giant spider would attack any minute.