You're a talented writer, but you're writing your screenplay too much in the style of a novel. You need to write only what the audience sees and hears on the screen. It's okay to embellish your action lines but keep that brief. Mad's character description, which is great, should only take a half page or one page at most. The story doesn't start until page eight when her mother enters the room. Can it be page two? The conflict between Mad and her mother is a perfect way to start. Is Dr. Martyn getting in his car a necessary part of the story?