I'm going to ask a few questions, if you don't mind.

Does the onset of pain happen when you twist your torso?

Is your pain on, or under your ribcage? Meaning, when you press on the area, is the ribcage swollen and sore to the touch?

Have you suffered any trauma, such as a car accident, or fall, recently? (within the past year)

Does the pain sometimes radiate to your arm and shoulders?

Peace, Molly