It seemed to me like you could use a few words of encouragement, and I hope that when you see this, you'll find this a little surprise :> I know you've been trying to work, but make sure you pace yourself, Haret, don't push yourself too much. If you find yourself unable to focus, work for a short while at a time. Set a limit for yourself, say.. even as little as 30 or 45 minutes, perhaps an hour, but try to do some work and know that you can relax afterwards. Half the source of the draining feeling and not being able to work is that looming feeling that you need to work. So start with a short time period, relax for a few hours, then work for a very short while again and keep this up. Often you find yourself more productive than when you try to get yourself to work for a few successive hours. Once you've got that covered, step up the pace a little if you feel like it. I know the work is probably one of the last things on your mind right now, though =)
I hope you've had a lovely day, all the best with your work and please take care of yourself, always =)