(Ir)rational fear?

I have a fear that is somewhat debatable in terms of whether it is rational or irrational. And that fear is of extra-terrestrials. And I don't mean like the one above whom Drew Barrymore is kissing, I mean like Alien vs. Predator extra-terrestrials. Like zip-right-out-of-your-gut-making-a-bloody-mess-for-everyone-to-see-and-freaking-
everyone-out extra-terrestrials.

I guess this all began when I kept on waking up in the morning to find a small scratch on my nose. This happened several times, it was always around the area of my nose and it was the same brown scratch, always around the same length as well. Just one scratch. I just figured that I must've scratched myself in my sleep, but I found it odd that it was always on my nose and it was always the same depth.

A few days prior to my discovery of these marks on the nose, my dad was talking to me about these sheep on a farm that had been found dead by the farmer one morning, and all he found among them was a small perfect hole in each one where the blood had been assumed to sucked out of. There was no bloody mess like you would expect from a raid of wolves or coyotes, just empty farm animals, all (seemingly) perfect and fluffy on the outside.

So obviously I came to the reasonable conclusion that aliens were coming into my home at night and retrieving samples from my nose, leaving the evidential scar.

Although, I must admit, I have not found any scratches on my nose for the past year and this specific fear has in fact subsided. But it's not something I will forget or pass as an impossible situation. The aliens, they have their ways.