I need help finding the title of a time travel romance I read many years ago. The main character is a historian getting ready to go on a scientific trip to mideval times. She is accidently sent back by one of the scientists who is drunk at the time. She meets a knight back in time who turns out to be the drunk scientist who has been looking for her for a few years. Her character name is Jehaine I think. Does this sound familiar to anyone. Any help would be greatly appreciated!