Hello,
Do you snore? Or do you feel day time somnolence?
Your symptoms are suggestive of nasal obstruction which can be due to many causes. It could be deviated nasal septum or any nasal mass causing obstruction.
Next Steps
Visit nearby ENT Surgeon for complete Nasal examination and diagnosis.
Health Tips
Weight loss, try sleeping on one side & cardio exercises such as brisk walking/Jogging.