I am a hybrid

Hi, I am Sasha. I am a teenager suffering from a rare blood disorder. I live with my mother a homicide detective. My older brother is back home after a tour in Afghanistan. My life sucks.
One day I made my usual trip to the hospital for a blood transfusion and series stringent tests. I heard a conversation between two people about a box containing the cure to all the problems. I have had enough of my life being sucked out by this hospital and my illness so I snuck out low and slow. I used its contents on myself. Now I have to deal with the consequences of my actions. I am now a fusion of two species. I am a hybrid.