Tanap1, are you aware that there is also a diagnosis of Hashimotos Encephalitis. Your symptoms of memory loss, fatigue, seizures, word aphasia, etc are all symptoms of encephalitis. I have Limbic Encephalitis and had your symptoms and when in the ER, they initially thought I had a stroke. IVIG also worked for a few months. I belong to a page on Facebook called International Autoimmune Encephalitis Society and they are AWESOME in helping people with questions and to let you know you’re not alone. They also have a website. One of they first things I would suggest would be to have your dr do an antibody test via spinal fluid and have that sent to a clinic i.e. Mayo that is qualified in antibody testing. That’s the only way they confirmed my diagnosis. There are a lot of forms of autoimmune encephalitis and each have their own list of meds that work, and symptoms. Don’t give up, you just need the Dr who won’t give up until he/she has a proper diagnosis.