why I don't think on my feet

I have had a hard week for writing. Spent a lot of time trying very hard, forehead all scrunched up, thinking like lifting heavy weights. So very little to show for it.  Yesterday after four hard hours and unquantified amounts of chocolate, I came away with one line of plot, a single sentence.  I actually was thinking so hard I fell asleep, and heard myself murmur the line to myself as I drifted off. 

I know, I know.  Thinking so hard you fell asleep?  Um, Trish, isn't that more like just being a bit dozy?

But that's what happens to me when I really think.  I pass right the hell out. 

Anyway, I scratched out some words today with great difficulty.  Take that, entropy!