Hey there. Posted on your other thread I believe, but I thought I'd also post on this one in the hope I can reassure you.
Let me start by saying that I have had sinus issues on and off for fifteen years. They seem to run in my family, as everybody has difficulty with them.
Problems with my balance, particularly with posture changes, vertigo to the point I cannot travel at anything above my standard walking pace, pressure in the forehead, around the eyes and nose, in the cheeks, the ears and even in the jaw itself, heaviness, feelings of cramping. All of these are most certainly issues that I have had to deal with myself, and can very much be caused by a sinus issue. Also remember - you're anxious, and anxiety itself can cause all sorts of issues.
It could also have been that your initial balance issues were the result of an ear blockage, and then anxiety too over and has been causing the other symptoms itself. Even with the initial issue cleared up, those 'mock' symptoms would remain, as the anxiety is still present.