3 weeks PO. I'm unable to breathe through my nose after septorhinoplasty. Is this normal or should I see another doctor?

If you're having difficulty breathing, it can mean that there may be a problem with the repositioning of your septum and the septum may be blocking your airway. Alternatively, it could be due to excessive swelling. I would recommend returning to your surgeon to ensure there is not a structural problem.

Thanks for your question, and I am sorry you are frustrated with the recovery process. Since you are still early in your healing, it is not at all unusual for you to still feel like you can’t breathe out of your nose. Septorhinoplasty is a complicated procedure that affects the entire internal structure of your nose, and it takes a substantial amount of time to heal completely. I would advise you to continue to use your saline drops and keep your follow-up appointments with your surgeon to monitor your progress. I wish you all the best as you await the outcome of your surgery!

You had a septoplasty but your breathing issues may be related to other areas of obstruction like your external valve, turbinates, or internal valves.  Discuss with your surgeon if this is the case.  Also you must ensure all swelling has resolved.