So all I can recall was that the story revolved around two "warring" factions of gods and their chosen people. One culture believes their gods to be the only "true" gods, and the other culture believes the same about their own gods.
The story starts off with a girl who experiences a magical phenomenon and no one knows what to make of it. Later it is revealed to her that she is becoming a god and the "Gods" don't like this because she discovers that both factions of gods are the same, though they appear to the two cultures as different entities in order to cause stress/war between the nations in order to keep the people worshiping them.
Anyone have any idea what book series this is?