If I was in Flash (TV series)

When Nora West Allen went back to the future she changed the present so much that she changed the future, and wiped herself out of existence. Barry and the gang never found out about this change. They were always expecting Nora to come, but she never did. Instead a girl came from the future and told Barry she was his daughter. She had powers, but she wasn't originally a speedster. Barry told Iris and they found out that only Barry was the parent and the mother was unknown. Untill one mistake found out who the mother really is.