Sleep problem. Us on the best treatment.

My girlfriend's CT scan of the nose shows an S-shaped deviated nasal septum (DNS) with a right septal spur and hypertrophied nasal turbinates. Because of this, she sometimes experiences difficulty breathing through the nose, especially during the night. Her biggest problem is that she is unable to sleep properly. Most nights she sleeps only 3 to 4 hours, and she often wakes up because of nasal blockage. This issue is affecting her daily life and overall health. She had a previous fainting episode, so I also got a CT brain scan done, which came back normal. Could you please advise: Whether these symptoms can be caused by DNS and enlarged turbinates. If she needs to see an ENT specialist urgently. Whether any safe nasal spray or medicines can help relieve the blockage and improve her sleep. Whether surgery might be required if medicines do not work. She has no known brain abnormality according to the CT scan. Please guide us on the best treatment.