Help chest pain from bad cough? Could it be bronchitis?

I have had a really really bad cough for a few days now, and at first my chest just hurt when I coughed. The thing that hurts most is the sternum. Now it hurts all the time, especially when I cough. It also hurts my stomach because it contracts a lot when cough. Any way to help this or stop the coughing? Could it be bronchitis because my nose is stuffed up and I have trouble breathing sometimes?