Hi, I am a 29 year old male that has been smoking a pack to about a pack and a half of cigarettes a day for almost ten years, except for the times when I attempted to quit. For a little while now (maybe 3 months) I have had a tightness under my rib cage along the right side, along my back. I have also recently found two very small lumps along the front of my rib cage on the right side(one the size of a pea and one the size of a dime), and sometimes when I am sitting down and leaning forwards I can feel something slipping or popping along the bottom of my right rib cage in the front. I am very afraid that I might have cancer though I do not feel any pain when I breathe deeply, I don t cough up blood, or have an symptoms like that. Can you please help me.