The Davis Square Community

I'm probably a paranoid weirdo, but I thought I would post and see if anyone else had had this happen recently. Someone rang our doorbell (1st floor of a 3 family on Highland Ave) 3 times last night at around 1:30. They paused very deliberately after each ring. We didn't make it to the door in time to see who it was, it being 1:30 am and all. They did not ring the doorbells for the 2nd or 3rd floor. We went back to sleep after checking the driveway/side entrance, but it still gives me the creeps. Has this happened to anyone else?