Hey, I have Pectus Excavatum, I would get it checked out just to be safe.
My parents didn't really think it was a big concern and neither did I but when we actually got it checked out we discovered problems with the heart and ribs that we wouldn't of realized until it was too late otherwise.
Better safe than sorry.
It's hard to tell if you have it without seeing it, but any deformation of the chest is definitely worth getting checked out.