It looks more of a psychological issue and lot of stress causing a vicious cycle. As whack suggested - try relaxing a bit and giving yourself a break for a wee

It looks more of a psychological issue and lot of stress causing a vicious cycle. As whack suggested - try relaxing a bit and giving yourself a break for a week or so. You will be surprised at how effective breaks are in improving performance. This is one of the most common mistakes junior programmers do - no breaks and constant coding until you get burnt out. I am writing a book on using mindfulness to become a better software engineer - https://leanpub.com/selfdebug/ https://leanpub.com/selfdebug/ - you can download it for free and see if it helps.