Lamp Is Out

The lamp in my bedroom went out.  Don't know what happened.  First thought the bulb burned out, but then I changed it and it still wouldn't come on.  I don't think I am bent out of shape about it because I can see just fine in the daytime, to the point I forget the lamp is out.  But come the nighttime, when I am getting in and try turning on the switch in my bedroom and get nothing, that's when I remember that it's out.

Don't think I've done anything to it.  But maybe I jostled the dresser the lamp is on, dislodging the lamp's cord from the power strip.  I should check on it.  At some point.