Just a wee update. My daughter had all the symptoms of hypothyroidism (though she was very thin and losing weight). She was put on steroids to combat positive DS DNA antibodies and vasculitis but suffered psychosis and was admitted to hospital. We eventually got a diagnosis of autoimmune encephalitis when MNDA receptor antibodies tested positive. Thank goodness someone tested this or I'm sure she would certainly have been labelled either with bipolar or schizophrenia in the absence of anything organic. She was treated by Neurology with immunoglobulin transfusions and almost immediately the psychosis and other symptoms cleared. Only 1000 cases reported worldwide in last 6 years (for info see, "My Brain on FIre: my month of madness" by Susanne Callahan). It has mainly been young women in their twenties who have been reported when there was a sudden change in behaviour ( a bit like the exorcist and "demonic possession").
She has also had her nodule on her thyroid aspirated so awaiting results of this. It's an interesting and developing new field this Autoimmunology and course there is the link between autoimmune disorders and the thyroid. It's all very intriguing.