Female - What could this be and what type of doctor do I see?

I want to know what I may have and whet type of specialist I should see. I had near head on car accident a 5 months ago and since then my chest area has been very tender. I realize it could be from the seatbelt and the air bags but it does not feel right. The exact area is on the left and right of my sternum, not the middle between my breasts but the area on the left and right along the top of my breasts. When I touch these areas they are very tender and actually feel lumpy or swollen. I have no idea what this is but would lie to know what it may be and what type of doctor should I see for this? What type of specialist? I have seen an ortho specialist for problems with my shoulders and a spine specialist for problems with my neck all since the accident.

I did some research on the computer and sa something called Costochronditis with similar symptons could it be this or something else? could it be rib damage in that area?
Thanks