Pilot Chick,
It sounds like whatever it is, has not "just gone away on it's own". I am not a doctor, though I do have some very limited medical training. Were I to be in your situation, I would be going back to the hosipal without too much delay. Perhaps the difficuly with your sight is only a symptom of something else. I hope that the doctors you have seen also have suggested this.
I hope it's nothing more than a bad migraine, and leaves you shortly, but go and be sure...
Pilot DAR