My roommate is complaining of anxiety, feeling like his nervous system is failing, having anxiety attacks on a regular basis, says he just feels weird with no real significant complaint. He has lost his appetite and is barely eating. He is jumpy and his legs are shaking during one of these attacks while sitting down. He has been to the Er and all the routine tests are negative. Is a hormone imbalance likely to cause these symptoms. The ER told him to go to a neurologist.