I have been experiencing pain in my ribs, from between my shoulder blades to my right nipple. I originally thought it may be from my recent cold and a coughing fit, but my ribs have become more tender, with a dark green (no odour) discharge from my right breast when I express it.
I have had a small amount of discharge from both of my breasts (when pressure is applied) since having my child 6 years ago, but it has never been this colour.
I have also recently started a self-defence course, and thought the pain may have been a muscular strain.
Is this something to be worried about?