Three things that are messing with my head:
1. While climbing the stairwell on my way to my classroom, I stumbled upon a large piece of human feces and urine. The feces was, err, definitely human and not from a child. I notified the main office with my best "this isn't my first time coming across this kind of thing" tone of voice, although truthfully, I just wanted to run out of the building in total disgust that I work in such an environment...as a teacher.
2. I'm a wee bit behind in the history curriculum. By about a century or so. Yep.
3. It was strongly suspected that one of my students was carrying a weapon. I notified admin and the child was searched. Nothing was found. Child later boasted in homeroom that he threw the contraband out the window before the search. I'm all "Dang! I just want this little bastard suspended! He's driving me nuts!" when I know I should be more "caring and understanding" (but sometimes that's so hard).