My mom has factor V leiden, what are my chances of having it since its hereditary?

recently my mom found out she had a blood clot in the artery to her lung and little mes in her lung. She was dianosed with factor V leiden disease THIS MORNING, it took a couple months of pain on her part before we had a diagnosis. She has 2 birth daughters, me and my older sister, and then I have 3 half sisters but their not her real daughters. Im 14 and my whole family, including my mom, exercise daily and eat healthy. I learned that FVL is hereditary.... what are me and my sisters chances of having it??????????????? plz help as much as u can im so sad and scared :(