Hello~I am sorry you are suffering with the vertigo and other issue, I, too, have vertigo and dizziness and all the symptoms you have, it is no fun, I am 63 and my symptoms started after a fall down the stairs when I was in my early 20's.
I see a chiropractor as well, his treatments help for a few days, then I am back to all of my symptoms, it has always been that way for me, and I have been seeing chiropractors both in America where I am from, and now in New Zealand where I currently live. I am just one of those that don't "hold" like some other folk.
Perhaps doing some stretches would benefit you, I know they help me. Next time you see you chiro, ask about them. Also, does your chiro do disc decompression, mine back home did and it really helped and the adjustments lasted longer too, also cold laser treatments for inflammation as inflammation can cause the symptoms as well. Sadly, over here, the chiropractors don't do either.
I hope you feel better soon and can find some relief. If there are other chiros in your area, maybe see one of them, and ask about the other treatments I mentioned.
So sorry to know the problems that you are facing now. I too had similar symptoms a year ago. But at the beginning itself, I consulted a chiropractor and he was a nice man who explains all my health conditions in a cool way. And started my chiropractic treatment then. I continue the treatment now also even though I have no symptoms at first. Regular chiropractic care could help in improving the quality of life also.