The Dark of Twilight by Kate Danley

Aein wanted to be a soldier in Lord Arnkell’s army since she was a child working in the stronghold’s kitchen. When that day finally comes and she is sent to patrol the swamp with fellow warrior, Lars, it seems like a dream come true. But something follows her home. When Lord Arnkell’s wedding is interupted by a werewolf attack, the dream shifts into a nightmare… and Aein is the only one awake.