I've had similar dreams as well. They usually only happen when I'm extremely stressed. It's usually my teeth falling out, and oh is the sensation of loose teeth rolling around in my mouth both vivid and horrifying.

One time it was my tongue swelling up til I couldn't contain it in my mouth anymore, and another I was chewing bubblegum, but no matter how much gum I spit out, the gum kept growing until I was choking on it.

I also had a dream where my teeth fell out, I woke up, was relieved it was only a dream, and got up to go the bathroom. Everything was normal and exactly as it should have been. Even the bathroom light switch worked, which is usually one of those things people say is a dream-tell. Then my teeth started getting loose again, and I panicked and woke up a second time. I had been just been dreaming that I woke up the first time.