Abby,
I am sorry to hear about your vertigo issues.
I have had this illness for many years now and I have found nothing really works. This may be just my experience, and not the case for everyone.
I have had the shunt surgery. I assume that is what is meant when people say a grommet in this forum. Basically, you have a tube surgically implanted in your ear that is supposed to help regulate the pressure and get rid of any excess fluid. I have done chiropractic neck treatments, as I was told that it helps some people. I haven't had caffeine in years, I have done the low salt diet a few times. I have taken a couple of different drugs. None of this has had any long term affect, if any affect at all.
After all these years, I believe that the viral hypothesis is the correct one. Everything you are told about Menieres by medical professionals is a guess. There are more than one way of thinking on what causes this illness, and since there are so many thoughts on the cause I have surmised that it is different for different people. For me, the illness acts like a virus. it pops up from time to time, and then goes dormant for a while. It makes my life as miserable as the other posters here, and then goes away. It will rob you of any enjoyment if you let it. For a few months it sent me into a state of depression that was even harder on my wife than it was on me.
I know people come to forums looking for cures, or at least temporary relief. I am sorry that I cannot offer that, as I spent a very long time looking for it myself.
The only advice I have is stay positive (yes I know how cheesy that sounds) and try to enjoy of much of your life as the illness will let you.
The only real cure I have heard about is to have the nerve to whatever your affected ear is cut, and there is a 100% chance that you will no longer have vertigo from that ear. The downsides are, you will lose 100% of hearing in that ear, you have all of your balance from the other ear now. You will likely go through weeks of the worst vertigo of your life. You will have trouble walking, and have to relearn how. If the Menieres goes to the other ear, you are right back where you started. I am of course saving this as a last resort. When I am having strong attacks it sounds like a better idea than when I am not, but I have not had the courage to do it. From what I read from the people who have had it done, it is a nightmare, but they all say they are glad in the end that they have done it. When reading about these posts you can tell how long it has been since they had it done by how much happier they are. If it was recent they are still miserable.
When I was seeking relief I would try different things and go right back to being angry when the vertigo came back. I have given up on the false hope and try to make the best of what unaffected time I have. I still work, and against my doctors recommendation, still drive. I am able to work from home sometimes, and have taken Uber to work when I have to be there and can't drive.
My advice is, try to make accommodations to live with it. I know that isn't what you are looking for, and I am sorry I don't have better advice.
Darin