Im 40 Year Old Man......I Was Leaning Back In My

Im 40 year old man......I was leaning back in my chair. I rubbed my hands over my stomach just below my rib cage in the center of the chest. It felt kind of soft. Im not sure what it is supposed to feel like. But sort of felt like a bump. You don't feel it if you sit up. But if I stretch all the way back and stick in my stomach, you kind of feel it is soft like maybe something below the skin. it's not painful. I don't have any symptoms. I just don't know if what I felt was normal.