Without being overly simplistic, I think the answer to your question is similar to the answer I give patients when they ask if their nasal trauma has caused a nasal injury. My reply is that scans and X-rays aside, there are two basic functions of the nose to consider (3, if you include the sense of smell, but that occurs high inside the nose at the base of the brain):
Breathing (the nose allows respiration, and injury or deformity can cause airway obstruction for which surgical correction is needed)
Appearance (if it looks crooked, then to straighten it will require surgery)
So, if you bump your nose (surgery or not) or "catch" a softball with your nose and wonder if there's an injury, the knee-jerk response, even by many doctors, is to request an X-ray, CT scan, or MRI scan.
But what is really needed is to simply assess appearance and function. Of course, an injury can cause bruising and swelling, and those things can obscure deformity and impair function that will return to normal once swelling is resolved. So it's not wrong to obtain scans or X-rays, it's just often unnecessary in the absence of other concerns.
In other words, if the nose looks fine (minimal swelling), and works fine, then even if an X-ray showed a fracture, nothing needs to be done. Even if an X-ray appears normal, there can still be cartilage and soft tissue injury causing crookedness and deformity, and I don't need an abnormal X-ray or scan to tell me the patient's nose requires straightening or repair.
The same applies here. You bumped your nose and wonder if it's OK. Perfectly natural concern and worry. Here's how to see if it's OK. Let any swelling (if any) resolve, and then see how it looks and how it "works." If both are OK, then your graft and surgical procedure has been left undamaged. If there is swelling, you have to be patient, and then check things out. And you don't need your surgeon to do this--you can do it yourself! See how your nose looks and works, and if all is well, then your surgical result is unchanged from where it was before the "bump."
Since you feel something has "moved," you have to determine if this is localized swelling or bleeding that will resolve on its own, possibly a bit of scar tissue with increased swelling, or if in fact your graft has moved. The latter is unlikely at 9 weeks post-op since tissues are firmly adherent by that time, but not impossible.
So, give it a bit of time, see how your nose looks and works, and there is your answer! Best wishes! Dr. Tholen