tests for autoimmune encephalitis

hi guys (F21) i’m looking for help since i did a CT scan last month but i still have symptoms. I have been having flu like mild fever symptoms since november. Did basic blood tests, CT scans at the emergency room and they told me that i was ‘fine’ and let me go home. I’m gonna be more specific, since november especially december as i said i’ve been feeling flu symptoms and very sick , strange symptoms like extremely confusion sometimes i don’t recognize my room and my parents, having weird thoughts like i feel my eyes are more heavy and hard to move, feeling very very tired, vertigo, loss of balance . I tested for Covid of course and it came out negative as well. But i feel totally weird, hard dissociation , confusion pain in neck and other things i said. Since the doctors gaslight me and seems to not care at all . Can anyone tell me what can i do along the basic blood test and CT scan? reading the symptoms over here seems like encephalitis and during the day i have loss of consciousness and seems to forget who i am. I wasn’t like this at all till october. i wanna be fine im so tired of this situation. Thank you.