Dear anonymous, the injury
you had few years back seems insignificant, it would have healed by now. The pain you have needs to be evaluated, the exact site of pain (if its localised), any changes with breathing coughing. If it's over your costo-chondral junction (the site where your ribs meet the sternum
) it might turn out to be Costochondritis
. Its not uncommon and has similar symptoms. For that you'll have to take anti inflammatory medicines for a few days with hot fomentation. Do let me in few more details that I've already mentioned, and I'll get back to you. If an X-ray's done mail it to me on firstname.lastname@example.org.