Blogger's Block?

Is this a term? Is it possible I have blogger's block on a blog about writing?

I haven't been writing, although I had an idea for a story in the minivan on the way home from work on Thursday. I wrote it on the back of an envelope and stashed it in the little open spot under the radio.

I've successfully shot myself down, though, and lost enthusiasm for the idea.

Not feeling like writing lately or even blogging, really. Not sure why.