Have been experiencing some short-term chest pain and dyspnea for a few days, i cough few times a day and also have a runny nose, can it be lungcancer?

At age 17,: I could say with some certainty your symptoms are not from lung cancer. An ounce of prevention is worth a pound of cure... so at your age, the best thing you can do to prevent cancer if you're worried about it is to never smoke or use tobacco products. It sounds like you suffer from seasonal allergies, or a cold. Always see a physician if chest pain worsens despite over the counter meds.