It is possible to achieve a mild dorsal hump cartilaginous grafting. However the risk of getting asymmetry, crooked nose, or obvious bumps in that area which are not smooth is high. If you're happy with the nose at present then trying to make it perfect is not a good idea.
I think you should post your preop photos to show the docs on this site what you are interested in. Looking at the profile posted, it looks very nice.
A full set of photographs are required to make a determination about what can be accomplished with a revision rhinoplasty procedure. Computer imaging and a frank discussion with her your surgeon about limitations and expectations is very important.