Hey there NatureinTX and emma1024. I’ve got the same problem and curious if either of you were able to learn more about this? Mine just recently started, along with acquiring several new food allergies as a result of COVID. When I wait too long to eat and get stomach-growling hungry, I also get intensely nauseous and can literally feel the sensation travel (I call it “transmuting”) up my esophagus and into my sinuses and I have a massively intense and violent sneeze (often a double or triple sneeze like “Ah-Choo-Choo-Choo!!!!”) then I’m fine (as long as I get something to eat or the nausea comes back.)
I’ll be scheduling an appointment with a neurologist soon and happy to update here if anyone is interested.