I’m a minor

I’m taking 1200mg of Lithium per nocte. I have severe brain fog, and my doctors believe my mania has nearly finished. We’ve figured out that medical problems aren’t big factors towards my brain fog. My doctor says it’s too much of a sticky situation figuring out the ‘brain fog big factor’ problem and she thinks putting me on an antipsychotic will help the brain fog. 

What would some key arguments be for me against taking an antipsychotic?