10 points...I'm having pain in my chest (lung area)?

It is possible that pneumonia would affect only one lung. Your doctor will be able to test and find out. Tell him/her every detail you can about the pain. Does it happen more often at a certain time of day, does the pain have a radiating feeling or a localized feeling, etc. Maybe the bronchitis you had has left phlegm in your lung and it's uncomfortable. The doctor will help you. Good luck!