What Causes Ear Clogging With Tinnitus?

Hello, currently I ve been dealing with a fullness/clogged feeling in my left ear. Along with that there has been slight ringing sensation. This has been going on for alil over a week now. I have no allergies, have not had a cold or sinus infection, and have not been swimming or flying lately. I am worried it is an acoustic neuroma. The doctor diagnosed it as blocked tube but I find it hard to believe when I haven t been sick at all recently. I have had tubes placed in my ears as a kid twice, and one other ear infection that I can remember. Is his diagnostic seem normal for these symptoms? He suggested if its not better in 3-4 weeks I call him back and set up an ENT appointment. I feel I should go in sooner in the case its something more than blocked tube. Would rather catch a tumor when its tiny then have to wait and see only to have it had grown into my brainstem.