The Opposite of Chocolate by Julie Bertagna
It's a long, hot summer - and a climactic one. For fourteen-year-old Sapphire it brings the awesome, terrifying realization that she is pregnant - a discovery that catapults her into the eye of a storm as her body, her future, her life, become a battleground for everyone's needs but her own. Meanwhile, out in the humid urban night, a mysterious firebug is running wild, working out his own anger and confusion with dramatic consequences. Somehow, from this cauldron of emotion and fear, Sapphire must find a way to take control of her life - and make the most agonizing and lonely of choices.