Your new nose should get "smaller" and improve in contour as time goes on. Following rhinoplasty as swelling and scar tissue evolve, the nose seems to get smaller. A nose will ultimately look only as good as the underlying structure that was left behind by the operating surgeon.
Unfortunately there are many patients whose noses look fabulous when the splint and tape are removed only to have a "shrink-wrap effect" take place over the subsequent 2 to 5 years. This occurs when the underlying cartilage and bone are insufficient resulting in that "pinched-done" nose job look.
In your specific case, your surgeon is best suited to tell you what to expect over the next few months to year. At 4 1/2 months following surgery, there should be a good general idea of what your nose will look like.
Certainly we do not recommend revision surgery for at least 6 to 12 months following your initial procedure. On the positive side, it is always easier to take off a little more to make a nose smaller than to have to augment the nose to make it bigger.
Be patient, stay close with your surgeon and much good luck in your healing process.