Wow, sounds like you have had a lot of ups and downs. Sorry to hear that you're feeling so bad right now.

Mark has some good advice about resting and taking it easy. Sleeping a lot and not trying to do much is probably wise at this point and will help you recover as quickly as possible.

Here's the list of things I came up with that I could do without hurting myself while I was at that phase of recovery: http://eowynridesagain.wordpress.com/game-basics/

Also, just be aware that caffeine is also not real great for your brain while it's trying to recover. It may give you energy, but it also can interfere with your brain healing itself. Good nutrition is important.

Good luck!