A 20 days I am sure you are very hyper-critical of the results. You have to take a deep breath and relax a bit. Allow things to heal and follow closely with your doctor. It can take up to a year for things to settle down.
Rib cartilage can always be removed, but wait until you see your final result before considering another revision. Slow down and be clear about your goals and expectations if you decide to have more surgery.
Although insurance companies may cover breathing problems, if this is because of a cosmetic rhinoplasty, you will probably have a lot of trouble getting coverage.