That's the beauty of reading of others shared experiences: you are encouraged that there is a light at the end of the tunnel or it gives you ideas to try. I'm a little shy of saying to people, you have this or that as it could be totally off base but it helps to figure out a possible path to pursue medically. Check out the symptoms for meneire's disease as well as tinnitus (ear ringing) is a predominant symptom in that while it occurs sporadically in MAV. If you're able to afford it or have coverage, get a hearing test done. You can also get vestibular testing done which is pretty straightforward.
Interestingly enough, there was a study on people with Meneire's in which they were put on a gluten free diet and 30% of those in the study had a reduction in their symptoms.
Grain free for me means all the grains (gluten containing ones of course but also others such as Teff, Sorghum, Corn, Soy and so on. Technically they do not contain the gluten protein but are often contaminated in the production process with gluten grains. There was a recent analysis by the Gluten Free Watchdog on both certified gluten free non-gluten flours and uncertified non-gluten flours. You can find it here: https://www.glutenfr...g/blog.php?id=6
Rice is considered a pseudo cereal along with quinoa, amaranth and buckwheat (there are a few other pseudo cereals in that group but I can't think of them at the top of my head. I eat rice occasionally and it's always from a brand that assured me that they don't use wheat in the rice-wheat rotation planting. Other people use nut flours like coconut, almond flour and so on but I'm in the place where I"m just happy to eat my veggies, fruit and fish and don't need or want the complex carbohydrates from substitute non-gluten flours.
Hope this helps!