hello my husband has strange systoms... blurred and doubble vision, sweating, lightheadedness, inner shakes, headaches, and the worst... he smells ammonia and when he dose sometimes it makes him pass out. he has had x-rays, an ekg, cat scan an mri, and blood work, and everything came back normal. I am terribly worried, because he was driving to work on the right side of the highway, and he must have passe out because when he opened his eyes he was all the way on the left side of the highway. my husband is my everything,and our kids world. he is one of those rare good guys that u hear bout, and i dont even want to think about what might happen if he would pass out at the wheel again! what could cause that or what other tests could he have done? can someone please please help???