My daughter fainted on the subway on Tuesday. Just before, she reported tingling in her left leg and arm . On Wednesday, after a similar feeling at school, my wife and I took her to the ER. Her urine indicated that she was a little dehydrated. Her MRI was normal. The weakness has persisted and late this afternoon, she fell after her leg gave out. She said that this was precipitated by heaviness in her chest, which was helped by albuterol. Could this be multiple sclerosis?