Just procrastinated 12 hours straight then fixed a bug in 10 minutes. FML.
It probably didn't help that for the first six of those hours, I was pissing about waiting around for medication to kick in and wondering why I couldn't seem to settle to any task, before then realising I'd actually forgotten to take the bloody stuff today. After hitting the 8 hour mark and achieving nothing, I was well on my way to an anxiety attack over wasting so much time.
But the bug is fixed, so I am choosing to consider today a fucking success, god damn it!!