Why is my ear doing this?

It sounds like you could have a secondary ear infection. You had probably better see an ENT specialist.

I second what @marinelife said. See an Ear-Nose-Throat specialist.

Or just a regular physician or nurse practitioner. Stuff like this is bread and butter.

Of course, I am unable to examine your ears with an otoscope, or to perform a tympanogram (a measure of eardrum movement that can detect congestion that isn’t always visible through the otoscope) via the internet; therefore I can not diagnose your condition.

Popping is a sign that the Eustachian tube is trying to work to equalize the air pressure behind the eardrum with your environment.

If you can barely notice a decrease in hearing it may just be a lot of pressure behind the eardrum. Typically, one notices a mild to moderate decrease in hearing if there is fluid behind the eardrum (which can breed infection or can stay there without getting infected). Substantial congestion or rapid pressure changes in the middle ear can throw off your equilibrium or make you dizzy.

Ideally, you should be examined by a medical professional. Ear pain is one of the most common reasons for doctor visits, as @Rarebear mentions. However, I have seen pretty obvious issues that were missed by primary care practitioners; so if you can see an Ear specialist without needing a referral or having to wait much longer to get an appointment or spend much more for the visit, it would be best.

Meanwhile, applying a warm compress can ease some discomfort; as can breathing in steam from a hot shower or drinking hot teas and eating hot soups. Over-the-counter pain relievers and decongestants might also help. Nasal sprays can be effective, but some of those medicated ones can be problematic, so only use a saline spray unless something is recommended by the examining medical professional. Try to blow your nose very gently – sometimes blowing too hard creates excessive positive pressure behind the eardrum.

I hope you feel better soon!

Go see your doctor. That sounds like an E-Tube issue and maybe you haven’t got the infection totally cleared up. When it comes to infections in the head don’t mess around. There’s way too many critical organs up there.

I totally agree with @Rarebear if you went to an ENT specialist they would wonder why your GP didn’t fix the problem it’s very common and easily treated.

Have you tried taking an antihistamine? Did you take antibiotics for your sinus infection? I would take an antihistamine for a couple days and see if the problem goes away. If not I would see a GP as @Rarebear suggested. He’s the doctor, I am not a doctor. Your eustacian tube might be inflamed or not functioning correctly, but over time following the infection going away it might get better on its own I would think. If it isn’t getting better maybe steroid drops or an antibiotic is in order, the doctor would know what to do. I think an ENT at this point is overkill, and I am usually the one suggesting specialists.