Can anyone help me with my ear problem?

I know i’ve asked this question before, but received little advice in regards to it so hope you don’t mind me asking again.
I have had blocked and crackling ears for about 6 months now.
6 months ago I got an ear infection from using a nettie pot wrong, it cleared up but ever since then my ears always sound like they are popping, and always feel full and slightly deaf – it’s only when i yawn or swallow, never voluntary.

Does anyone know what this is?!
My doctor told me that i didn’t need to go to an ENT and that it would just clear up if i kept taking sudafed… but um…it’s been 6 months, any help would be greatly appreciated.