Grace Miller was a 24-year-old law school student when she was diagnosed with multiple sclerosis . For years prior, she’d had severe fatigue, which a neurologist initially suspected was caused by narcolepsy. When she was struck with bouts of vertigo and eventually temporary vision loss, the doctor determined the correct diagnosis. Miller, now 46, of Fishers, Indiana, spent 15 years on two different medications that made her feel sick every time she got a new dose. Her vision has faded in and