What Do Dizziness And Loss Of Balance Indicate?

Question: In August I woke in bed with a sense of dizziness/loss of balance which I've experienced before, more than a year ago. I noted it coincided with a sudden deterioration in the weather, making me think it may be air pressure related on my inner ear. For the next 5 days I had a constant low level background "on the verge of" queasiness , mild nausea etc, which built and felt like it was about to erupt into flu like symptoms, but then disappeared. 10 days later it began again. I visited my doctor by which point a kind of pressure in the face was the more prevalent symptom and sinus problems, something viral, were presumed. I was given a spray and told it would probably clear up on its own. After two weeks I again felt on the verge of full blown ill health, with the persistent "dizziness" and queasiness. I returned to the doctor. The viral diagnosis was reconfirmed but I was given a "only take if it changes/gets worse "course of Amoxycillin. Over the next few days the dizzy/nauseous feeling disappeared as it morphed into cold like symptoms, which lasted from 17th September until just 2 or 3 days ago. At which point I finished the week long course of antibiotics. A third visit to the doctor's surgery last week added nothing new but, for the second time, they found htey couldn't see into my ears because they were completely blocked. So on Tuesday morning of this week I had the wax microsuctioned from ears. The sense of tension being relieved from my head/face was distinct afterwards...and my supposition then was that this had been the cause of my balance related discomfort and the cold symptoms were entirely unrelated and coincidental. However as of last evening I feel that same low level "something not right" balance issue is back. Its difficult to describe as I don't mean the world is spinning or I'm falling over...its more a kind of brain judder..a slowness or momentary delay in something moving in my head. Even that sounds more dramatic than I perhaps intend. Balance problem is the term I'm reaching for. In terms of sinuses my nose is now clear of congestion..I can now breathe freely through it, but I do stll sound a little nasal.