Jasmine Harris had a stroke six months before her high school graduation. It started with a headache a couple days before Christmas. The family from Raleigh, North Carolina, had spent the day volunteering so her mother, La’Wana Harris, assumed her 17-year-old daughter was just tired. But the headache didn’t go away after taking a pain reliever. Then, the day after Christmas, she began vomiting in the middle of the night. La’Wana figured it was a stomach virus. La’Wana was picking up ginger ale and crackers the next morning when she got a frantic call from Jasmine. “It was just gibberish, and I realized she could be having a stroke,” said La’Wana, who raced home and found Jasmine upstairs “wi