Have you ever had something happen to you, and you weren't sure what it meant?

Today I went to my office to water my plants (and to get the info on the Durango so I could get the tags)....and my key wouldn’t work in the locks. I tried and tried and tried, and they would not work. I was like, “WTH??? What does this mean??”
I figured it was one of 3 things:

1) Somehow the locks got changed and no one bothered to tell me.

2) I’ve suddenly gotten seriously, seriously stupid and forgotten how to unlock a door which wouldn’t look so good to my boss, or….

3).....?????....????.....????...

Could be nothing, could be seriously serious….I was kinda scared….