Thanks for writing to H.C.M. for your query.
I have gone through your query regarding swelling on your nose even after 10 days of injury
by slapped hit. You still feel difficulty in breathing which gets temporarly relieved by decongestant.
You have already been examined by two doctors and they found everything O.K. therefore chances are more in favour of only inflammtory swelling. but it will be better to do X-Ray nasal bones just to rule out minor or green stick fracture
of nasal bones, because in fracture swelling usually takes 2 to 3 weeks to become normal.