Sir, according to your complains it looks like you should undergo surgery for deviated nasal septum.As your deviated septum is causing significant obstruction in breathing, so we need to correct the deviated part by SURGERY.
Next Steps
Undergo surgery, go through proper radiology and blood tests advised by your doctor.
Health Tips
Keeping it untreated (deviated nasal septum) may result in ear problems (drum perforation/effusion in ear) as septum is deviated and there's no proper ventilation through Eustachian tube (tube connecting nose and middle ear), Bleeding from nose may also occur because of Crusting.
advise - Surgery