You should have written your age.
See if your nasal septum
is blocking your nose it is better you get it operated.
Secondly you can get done impedance audiometry
to know that you have fluid in your ears
If you are an adult and smoke get done nasal endoscopy
to rule out any mass in nasopharyngeal area ,that is behind the nose.
Getting grommets inserted is never a problem as they do come out automatically in few months.
It will be better go and see an ENT surgeon and dont panic and believe on him.