It is confusing dealing with headaches like this.

I'd get evaluated by an opthamologist to see if you have any pressures on the optic nerve. There is benign intracranial hypertension(also called pseudotumor cerebri) which affects vision. Also pituitary adenomas are pretty common and in many people don't give many symptoms.
But they can press on the optic nerve, or create pressure within the skull.

A good neurologist who deals with headache alot, may help. There are many forms of headache that people call "migraine" which are really not.

So I agree with Peter... please get some medical help.