For what it's worth I smashed my ribs on some rocks last month. Hurt like brown trout for a while, especially the first two weeks. Coulda been bruised or cracked I don't know. I do know my RIBS and the area around hurt every time I touched it, put pressure, and sometimes when I breathed. I never, in the acute, or healing stage had a "stabbing pain in the lungs".
Really looking forward to the update to this, "The Dr. Said...." What Seacliff said. Go get better.