In Norse mythology, a Valkyrie is one of a host of female figures who decide who will die in battle. Selecting among those who die in battle, the Valkyries bring their chosen to the afterlife hall of the slain, Valhalla, ruled over by the God Odin.
As a female entrepreneur you made a decision to go for it, you decided to to think long term. Even though you may be experiencing difficult times giving up is not an option for you. Think about the reason why you started in the first place.