Okay. I need help with my next story. It involves time travel, and I know that there are rules about time travel in fiction. So, my plan is to have the main character travel back in time in order to save someone from death (like Harry and Hermione did in the Prisoner of Azkaban), but she is not going only a few hours back in time, she is going years back in time. I'm talking about decades. The story will start out in the future (like sometime in the 2020s), and she goes back to the 1970s to save a man from being murdered. She was born in the 1980s, so this murder occurred before she was even thought of. If the main character was to get hurt in anyway from protecting this person from being murdered, how would that affect the future? Would she be born at all? Would she be born into a different family? Would she be born with some kind of deformity because of the wounds suffered during time travel? If anyone could help me with this, I would greatly appreciate it. I would like to start writing this story as soon as possible, but I do not want to get anything wrong about the rules of time travel in fiction.