Okay, let me preface this by saying I am not a doctor, just a well-read mom with experience.
My 9 y.o. just went through something like this (very similar symptoms), and was diagnosed with "nonspecific vertigo" which is a fancy way of saying that she had vertigo, it eventually resolved on its own, and the doc still has no clear idea as to why. The ENT says he sees a lot of this kind of thing, and that it is most likely caused by calcium crystals in the fluid in the inner ear, which are normally attached to the walls of the inner ear, but can detach and float around in there, causing vertigo symptoms for awhile. They did all kinds of tests to eliminate other causes. After about 4 months, the problem solved itself, which the doc says is also common.
IF that's what is going on with you (big if - other conditions can cause similar symptoms), the good news is that other than the problems the symptoms themselves cause, it is not dangerous, nor is it something that is urgent. The bad news is that there is nothing medical that can be done to fix it. I'd recommend heading in to your primary care doc as soon as your insurance is fixed - less than a week now.
Another possibility - is the vision shift and queasiness followed by a headache? Does it happen at specific times, such as when a storm is rolling in, or when you are about to start your cycle? If so, you may be developing migraines. The sensitivity to smells and the queasiness you describe are almost exactly what happens to me when I've got one coming on. I don't get the shift in vision, but one of my girlfriends does. Not pleasant, but again, something that will wait until the better insurance kicks in.
Bottom line - as soon as the ink dries on the new insurance papers, head in and see your doc. Also, do a little research (which I suppose you're already doing, since you're posting here to gather information) and make sure there's no reason to drop everything and head for the clinic now.