The following quote is taken from the above link
How big does it need to be for a person to feel it?
What an earthquake feels like depends on many factors: the magnitude, your distance from the hypocenter (considering the depth of the quake), the type of soil or rock you are on, the building you are in or if you are outdoors & what you are doing at the time. Under ideal conditions, you are lying or sitting still in an upper floor, right on top of a shallow earthquake, you might feel a 1.8 if you were paying attention. Usually, however, it takes at least a magnitude of 2.0 for multiple people to notice a quake & recognize it as a quake. A 4.0 usually gets a lot of public attention if it happens under a populated area.
So, IMO, I do not think it was an earthquake cause it looks like we really wouldn't even be able to detect anything under a 1.8 magnitude. Maybe you forgot to turn off a certain device in your bedside table
