what normalizes the sympathetic and parasympathetic nervous systems? is there something that also normalizes the immune system and inflammation?

I've got a laundry list of diagnoses for which the treatments contradict each other. Basically I need to normalize/balance my nervous system, immune system, and inflammation. My doctors each know their 6 inches of the body and how to push one thing higher/another thing lower with drugs, but nothing about balance. Herbs are smart and can *normalize* based on what's out of line. I got all my nutritional deficiencies fixed finally and that's helped but I need something more.