Give a a couple of days. If a bruise starts coimg in and its still sore to touch see a doctor.
Sound like a hematoma and you might have hit a nerve. Also for the bruise put an ice pack on it to minimize the pain. Put a heated pack on it to spread the blood so the bruise will go away faster.
For the pain take some motrin if you don't have any medical problem or if you are not taking any current medication consult with you doctor concerning medication. If this helped please click helped