Bells palsy....numb across face on once side. I had it. I had a bad canker sore that was in the back of my mouth between my molar and cheek......it irritated the nerve back there and i had feelings of vertigo and “the spins” Felt sick as a dog as well. Worst part of that all is the day I went to the hospital I was serving “security” for President Fords funeral in Grand Rapids and I was standing on the bridge over the Grand River when I looked up at the fighter planes flying in missing man formation and then fell to the ground. A few friends got me to my feet and then the hospital about 1/2 mile away. Nothing was conclusive but found later it was the affected nerve. Good luck with your situation. Prayers up!