This happened about two minutes ago, and this has never happened. Ever.

I was lying in my bed on my side, trying to fall asleep, when I hear something scratching my blanket (or pillow) right behind me. The blanket also moved behind me too. I turned on the light and looked on my bed, in case if a possible mouse had gotten on there. (You never know!)

Of course, nothing was there, and that area where it has happened has gotten really cold. This has never happened to me before. I've never felt something that close to me. And the air... It feels like someone put a bunch of ice at that spot...

I think I'm going to sleep in another room tonight.

Edit: I ended up sleeping in the same room, though I felt uneasy. I put in earplugs to help me sleep too. I fell asleep around two in the morning, and woke up once around four. I slept through the entire night after that with nothing else happening.