Dragonfly: the first spring

This is Book One of the Dragonfly Series. Jessica Abbot is a perfectly normal child of a perfectly normal family. Except that she is not of that family. Her real parents abandoned her in a Virginia swamp on Beltane, the day her adoptive family found her and celebrate her birthday. On her fourteenth birthday, she sets out through that same swamp when a wild creature lures her through a gateway into another world. She finds she is trapped in a terrifying realm of venomous monsters, ruthless nobles, and fearsome warriors. If she is brave, strong, and smart enough, she may discover not only the route home, but also the secrets to her past, her great destiny, and true love.