Dent forming in middle of nose. Is it collapsing? (Photo)

Your nasal deformity and compromised airway is likely related to the septal perforation.  You do need to see a nasal specialist, but I don't think waiting 4 weeks will make a difference.  Correction of your deformity may be challenging, so be sure to seek out a true rhinoplasty expert.  I recommend you get multiple opinions.All the Best,Dr. Brian Reagan

I am sorry to hear of your problem.A septal perforation, especially a large one, can cause the dorsum of the nose to collapse, resulting in a saddle nose deformity.  The main issue is to determine what caused the septal perforation in the first place.  Septal perforations have multiple causes, including trauma, chronic nasal steroid spray use, cocaine use, surgical injury, and a variety of infectious and autoimmune diseases.  Whomever you see in consultation will need to determine the cause of the perforation and get it under control before discussing any possible reconstruction.Good luck!