Constant headaches for weeks . past diagnosis of chronic migraine . new symptom of double vision . eye doctor said optic nerve full and slight blurred nasal margin . neuro thinks normal for me . not overweight. likely to be increased pressure?

You describe Chronic Daily Headaches, which could be secondary to migraines. The best way to confirm increased intracranial pressure is via a spinal tap. Ask your neurologist whether this should be done. Your normal weight does NOT exclude possible Pseudotumor Cerebri. Migraine can be controlled by the use of CGRP class drugs, and ask your neurologist about this approach.