Whay to do if nasal packing comes out?

Call your doctor's office. Probably just fine to leave it as is but the surgeon ought to know. It would be unlikely that the surgeon would choose to repack the nose. 

I agree to contact your surgeon. If the fracture was just a couple days ago then there are still several days where it can be reduced. There is actually some advantage to waiting a few days until the swelling has gone down.