Where Has My Imagination Gone?

I keep trying to think of things to write. I keep trying to let myself be swept away by a thought. I keep trying, but apparently you can't force it. I'm stuck in an
imagination rut. Perhaps it's because I've just finished school and my mind has decided to turn itself off for a while.

On Wikipedia, imagination is defined as: the innate ability and process to invent partial or complete personal realms within the mind from elements derived from sense perceptions of the shared world.

I'm feeling abnormal because I'm not able to access my ability to invent realms. I try to access the creative part of my brain, the part that seemed like a floodgate every time I had a deadline. Now it's my job to learn how to imagine things because I want to, not becuase I have to.

But it's not like I haven't been trying. I've been at my computer several times since my last day of class, trying to work out this character I've had in my mind, but my mind feels stopped up. At first I thought I was just tired, but now I feel like there might actually be a clog somewhere in my brain.

I need a brain plunger. Or a brain plumber. Or a brain vacuum. Or maybe I need to just settle down.