I'm BiPolar And Was On A Maintenance Dose Of Olanzepine

I'm BiPolar and was on a maintenance dose of Olanzepine for 12 years. I believe I developed Chronic Brain Impairment. They finally took me off Olanzepine and put me on 1400 mg of Epilim and 2mg Risperidone and I have been unable to function since even though the medication has been lowered to 500 mg of Epilim. I had severe withdrawal symptoms coming off Risperidone of headaches and nausea and now I have chronic itching. I want an MRI because I've had a Prolactin level of over 2,000 and in Hospital over 3,000 for 9 months and am afraid I have a Pituitary Tumour and that I am allergic to Epilim as it caused Oedema of the feet and legs and though I informed them they kept me on it.