Alright, I will give it a try.
Did you see a doctor? Did he tell you that you had ear infection?
This was after the cold cleared up? Was it as if everything was spinning or you just felt unsteady? The popping noise, and especially if accompanied with pain could indicate eardrum rupture. The eardrum is a very thing layer of skin and it doesn't take much to rupture it. Not sure if it can cause vertigo or dizziness though.
There have been reports of people getting episodes of dizziness following sensori-neural hearing loss. I had a short episode once or twice for no longer than a few seconds. This was during my initial stages of what would later become chronic tinnitus and clicking ears and hyperactive. Have not had them since, thankfully.
Fluid? Inflammation? Rupture? Check, check, check. How long after did you see this first doctor? So your eardrum rapture was less and less noticeable between your doctor's visits? That sounds like it was healing up nicely. So it's completely healed by now?
Earphones? The ones that seal your ear canals shut? Those are the worst if you want to preserve your hearing. So much so that the guy who invented them had to reinvent them because he realized that his invention was making people deaf. Sadly, I only learned that after I got here. So whenever I get the chance, I advise people not to use those.
His new invention is giving people their hearing back, people that have lost most of their hearing many years ago. That's kind of interesting turn of events. But there are still many people using this common type of earphones every day, all over the world. They go by different names but what they all have in common is that they are making us go deaf prematurely.
Your hearing problems may not have been caused by earphones alone. But they did not help either. It all adds up.
What position? Push down?... you mean moving your jaw down as when yawning? Or pressing down on your jaw at certain points? I used to be able to increase the volume of my tinnitus when yawning or moving my jaw to the right or pushing my jaw forward. But not so much lately, not sure why.
Being able to modulate your tinnitus with certain jaw movements is common among people with tinnitus. I think it's said that about 2/3 of people with tinnitus can modulate it in some way, where it changes in volume or pitch. This is believed to be because of hyperactive somatic neurons. There is a region in the brainstem that integrates touch and auditory information before it's sent up into higher parts of the brain. Most commonly in absence of auditory input, the somatic (touch) sensation becomes more prominent. It is this hyperactivity of these neurons that causes tinnitus. At least that's one of the theories that's currently being worked on. There is one ongoing clinical trial in Minnesota based on this model and another coming up in Michigan.
I would imagine that you don't need to have hearing loss at all to have these somatic neurons overactive, and drowning out the auditory information coming in from cochlear neurons. It doesn't have to mean that you hear less than normal, you just hear more than you need to or things you are not supposed to which isn't even sound but the brain interprets it as sound.
Luckily we all have TMJ, because without it we would not be able to eat, drink or talk. Note that TMJ means temporo-mandibular joint. We all have a pair, one on the left and one on the right side. Along with the knee joint, it's one of the most complicated joints in human body. When TMJ is not functioning optimally it is dubbed TMD, meaning temporo-mandibular joint dysfunction. So TMJ is sometimes used in error. TMJ is a desirable thing to have, but not TMD.
TMD is fairly common, just as the way many of us have slightly varying length to our fingers on left vs. the right hand, or the length of our legs. Nature is pretty amazing, but it ain't perfect. So you may have TMD for many years without knowing it. TMD only becomes a problem when you start having pain in your jaw or you start hearing unusual sounds and somatic sensation in your jaw. You may also discover that you have TMD only when you start analyzing yourself in search for a cause to a different problem. If you do have some TMD you may have gotten it by bad eating habits, trauma to the head or it may be hereditary.
I know I have TMD but it has nothing to do with my tinnitus. I sometimes get this squishy kind of sound in my left jaw joint. Especially if I am eating some hard foods. I can sometimes even hear and feel my jaw snap when I bite on something hard.
Same here, I was given those weird exercises, and I do have TMD. I did them the first week and then gave up. Not only did it help my tinnitus, it didn't help my TMD at all. I worried it would only exacerbate things so I started paying more attention to how I chew my food and what kind of food I eat and how I prepare it. That has helped me much more than those exercises.
You are not alone. My TMD causing these snaps or clicks in my jaw still doesn't mean that this is what I'm hearing when I complain to my doctor about my ears clicking. (I discussed this with you earlier.) I don't know how they draw that conclusion. They just reflect back at you whatever it was you told them. They learn more from us then we from them!
So what I like to do when I see a doctor is to tell him as little as possible, have them unwind about all the possible and impossible reasons for whatever it is I am in for, and then I draw my own conclusion.

You better not give them any ideas if you know what I mean!

Have them come up with their own material!