the best person to ask is your treating surgeon. Swelling in Rhinoplasty takes at least 12 months to settle down on average. Small amounts of asymmetry at 3 months is usually nothing to worry about. The breathing problem on the left may be due to a smaller nostril opening (as it appears on you photo) or from lack of tissue strength along the outside of the nostril... this can be corrected. Be patient!!
3 months post op Rhinoplasty, is my nose crooked?
There may be several issues to address, but it is really not fair to comment without the benefit of an exam and preoperative pictures.
Kenneth Hughes, MD
Los Angeles, CA