Teri is right; you do need to be thoroughly examined and dx'ed by your doctors, but I can tell you that I know optic nerve swelling to be a sign of hydrocephalus. This condition, known for being congenital and dx'ed in infancy, can actually occur at any age. If you find out you have it (your MRI will probably reveal it if you do), you'll need to see a neurosurgeon. A neurologist cannot treat this condition.
Good luck, and please let us know,
LIZARD