Pissibilities are ---
1- you may have deviated nasal septum
2- u may have sinusitis
3- U MAY HAVE RHINO SINUSITIS LEADING TO GLUE EAR.
u JUST NEED A THROUGH ent check up.
N dont worry it is just a benign condition that will resolve with some antibiotic and other supportiong drug.
THANKS AND REGARDS.