I took a friend to the emergency room on Saturday. She has symptoms of light-headedness, numbness, tiredness, and tingling/pain which has spread all over--arms, legs, feet, hands, lips, etc. The ER doctor did tests and found nothing except low calcium. She has seen her regular doctor. Today, I went up to her house because she was afraid to get out of the car for fear of fainting. Any ideas of what her regular doctor should check for or if she needs to see a specialist?