I've been diagnosed with bipolar I and GAD and I feel that paralysis sometimes. It's actually a thing in both anxiety and autism, "inertia" http://en.wikipedia.org/wiki/Inertia_(anxiety)

It's like I have this block and can't get over it. Luckily I haven't experienced it much lately, but I do go through periods where it's worse, usually when my mood is lower. Then I'm just stuck on the couch, knowing all of the things I have to do, usually tasks that make me anxious, but I can't make myself do any of them. At times like this, even the things I do for leisure seem boring or pointless. I just feel adrift.