I'm sorry you're not feeling well. *hugs*
Well, I have no idea what you could do re: the headaches, but I'm sure that paying a visit to your GP will not hurt. They will know how to assess the headaches and give you advice.

You could also get your eyesight tested, just to be on the safe side.

And trying to work in some regular ligh physical exercise (a half an hour walk a day perhaps) is surely not going to do you harm.

Last but not least, something that might distract you from the headache. The beauty of podfic is that you can listen to it whenever, so it'd be time away from your computer screen. :P