Hi, I am Olivia. I m 18 years old. I weigh about 200 pounds. I have had a cough for about two days. It is an itchy cough, but not a painful one. It also feels like there is a tiny bit of phlegm in my lungs, but not too much. I am nervous about this because over the summer, I smoked a few cigarettes -- probably only about a pack total over a month or so. I recently stopped. Is there any chance this could be lung cancer?