Serious The weirdest thing happened today

I didn't go to school today, and It was about 8AM. I was home alone but I wasn't really surprised since my Mother leaves by 7:30. I did my usual thing which was make some coffee and while the coffee was pouring, I noticed that the door was cracked a bit (opened). I closed the door and locked it then I checked around the house to check if anything was stolen. Nothing was gone. I called my mother and told her and she said that she locked the door and it was closed properly. I can't get this off my mind. Like Is this some "friday the 13th" prank? or should I be concerned that someone has a spare key to the house? Suggestions please?

I would think that maybe your mom thought she did but didn't. If nothing was stolen I don't exactly see a huge problem.

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Weirdest thing that happened today was possibly me running against a wall because i was too tired damn i need to get more sleep, its not really weird but ehehehe