alien abduction ???

I just recently lost an entire day people! how does a person lose an entire day? I was working on my computer and I looked at the clock, it said Thursday, later I went to bed and when I woke up and sat back down at my computer to do my morning emails, I looked at my computer clock again and it said Saturday 10:37am!! what happened! where did Friday go? I don't know, but it freaked me out. I can only speculate mental affliction or alien abduction. I mean seriously, who loses a whole day they can't account for? any theories? perhaps I have become mentally ill, they're always the last to know, are they not?