What is this Madness? Not running is harder than running?

I had a very sore shin today so I decided it was best not to run as it hurt to walk on it so running would be very bad.

Normally I would have gone and tried to run and just pulled up if it got worse however with only one weekend to go till the big day I didn't want to risk anything going horribly wrong.

For some bizarre reason it's harder to convince myself NOT to run than it is to drag myself out when I'm tired. I have been feeling a buzz all day and despite not getting much sleep for the past two nights I'm eager to go running.

Is this the first sign of taper madness?