I'd have your doctor ask one of his orthopedic colleagues to make an appointment to see him. If your growth plates - the areas on your LONG bones your growth occurs - have not "closed", it may still be possible for you to grow a few extra inches
You are correct that it is unlikely that you will grow any taller than you are already. There is not much that anyone can do about how tall or short they are. Are your parents both short?
There are some procedures that can be performed to increase height, but they generally require extensive surgery, and probably a lot of pain.