After yesterday night's reading of papers, where I began to question my entire approach, this morning and afternoon were wasted, moping and worrying about it. Haven't done a spot of work. Tried to look at some code, but no point. Still worrying myself sick. Got to get out of this cycle. Have been down this road before, it's just depressing.
Might as well give up and go home. No point staring at a computer screen.