<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am a 21 year old female. Yesterday I woke up with extremely blurry vision and double vision, my body extremely weak, Ive been having heart palpatations to the point I feel like Im going to stop breathing, I am having a hard time remembering things, my balance is really off. I find myself running into things, and theres a spot on my left arm where you gently touch it and it feels like someone is poking me with needles. I really need your help. Im really worried!  <response>: Hello! Welcome on Chat Doctor! I would like to explain that your symptoms are very complex and could be related to different causes: - anxiety-multiple sclerosis-thyroid dysfunction. For this reason, I recommend consulting with your GP for a physical check up and some tests: - a resting ECG- a brain MRI-complete blood count for anemia-thyroid hormone levels for thyroid dysfunction-PCR, ESR for inflammation. If all these tests result normal, you should consider anxiety as the main cause of your troubles. Hope to have been helpful! Kind regards, 