I have had an issue on two occasions where I have gotten lighted headed and passed out and thrown up.  I was taken to the ER the first time but nothing was done but bloodwork. My Dr. ordered an MRI and a Carotid Ultrasound. The MRI shows a 6mm white spot close to the brain stem and the radiologist said it could be a TIA or MS. What else could it be? I'm terrified because I have friends who have family dealing with MS and I have seen and heard what they have had to deal with. Assistance would be appreciated.