Does a deviated septum get better or worse over time?

I had light trauma to my nose, but the doctor said it wasn't broken. However, my right nostril is always blocked now and the left is not so smooth either. It's been months and I don't see improvenment. However, I NEVER had problems breathing nad nothing in my nose was actually broken, just bent out out of place. Will the cartilage memory eventually shift my nose back so I can breathe again? Why wouldn't my body heal itself? (there are no broken bones just bent cartilage)