I have exact symptoms and i was diagnosed with convergence insufficiency. You need to see a neuro-opthamologist and ideally one that prescribes prism/tinted glasses. Vision therapy is fine and works for some people, but others like myself don't respond to it/makes symptoms worse and need the prism.

I wouldn't be able to read or work with them. It doesn't get rid of all of my symptoms, but without them, I would stand no chance of being functional.

Mind Eye Connection is a very good place and worth traveling to. PM for more info. good luck!