prolactinoma

I was diagnosed last year with a prolactinoma and take cabergoline. The last mri showed tumor was shrinking. However, I still get headaches/pressure, dizzy, very tired, etc... I was also diagnosed with addison's disease and take 20mg. of hydocortisone for that which has helped increase my energy some. I also have Hashimoto's thyroid disease and take levoxyl. I recently saw my optometrist and he is concerned because I have deficits in my nasal vision. He thought there may be deficits due to the tumor, but not in this area. I am going for more vision tests the end of the month and maybe another mri depending on results. I am kind of worried and just want to feel good again. Any advice, support or ideas would be greatly appreciated!