Spider? Mosquito?

There's got to be something in the kids' room.  Each of them have woken up with bites somewhere on their bodies.  This is by far the worst.

 Kamri woke up with a bite below her eye.  A few days later it was still there but not that bad. Then Saturday she woke up and her eye looked like this.  It looked so sad.  She said it was fine, but it looked horrible.  It has since gone away, but we sprayed for spiders in their room. Hopefully we'll be done with bites.