Daughter is exhibiting signs of psychosis. She's actually psychotic, g…

Daughter is exhibiting signs of psychosis. She's actually psychotic, growling, screaming, contorting herself all over. If not for her... It started as early as 3-4 months. I didn't think it would start so early and I didn't really pay attention to it. And even less did I want to think that I would have such a "psychotic" child ?? Please help me.