I saw it in US many years ago. It `s an American film set in 20th century about a woman who discovers her supernatural healing powers when young. She starts healing people who are grateful at first, but later on they turn against her, calling her a witch etc Even her own father is against her. Deeply disillusioned, she decides to live at an isolated filling station in the desert. One day a couple with a terminally ill boy drive by and have a stop over. She heals the boy and the film ends.