Terrorist Attack on July 4th?

So on July 4th, I am flying across the country to Boston,alone, to move back with my mom. This being a symbolic holiday for America, what would be the chances of a terrorist attack? It makes me even more scared because i'm young, we just killed Osama, which may trigger them, And i'm traveling to Boston, which is a symbolic city in America. Do you think they will attack? What are the chances? does anyone know the exact plan?