It is good you are getting evaluated by a neurologist. Sharp pain can be so many different things. Hair loss can be an auto immune problem, and you should see a dermatologist specialist to rule out alopecia areata. This is a form of hair loss. Sometimes you feel pricking sensations on scalp with this. This isn't caused by anxiety. Some hair loss however can happen with stress, where you thin out all over. Alopecia usually presents with small round spots on head that are bald. Hope you can resolve all the issues you have and get some relief. ginnie