My ears don't pop even on a plane and ent says it's allergies. right ear always feels clogged in the canal but feels like there is no escape. 2yrs?

Ear pop: Your ENT is right. It can be due to allergies that cause general inflammation of your nasopharyngeal mucosa including the eustachian tube. This tube connects the middle ear behind the ear drum to the outside atmosphere. When the tube is clogged due to inflammation, air pressure can't equilibrate especially when you fly. Thus causing your ear to pop. Seeing an allergist could help.

Doubts out of way: Just get allergy skin test done if positive then act on if negative one doubt solved, have 2nd opinion my an ENT its question of hearing , use Dymista nose spray twice a day for 1 week. Ct scan of sinus is worth it.