I Used To Work As A Cna For Several Years

I used to work as a cna for several years and in that time I stated to feel sternum pain brushing it off as due to heavy lifting. year and a half ago right before I quit the pain was so bad woke me up at night slowly the pain went away but now has come back not as painful dull aches when I move a certain way or sneeze not when I breath I have even pushed really hard on my chest sternum and rib area and I don't really feel any tenderness no swelling. pain goes away with ibuprofen but always returns I am a long distance runner but other then that I no longer lift heavy things