Dream Interpretation – Chewing and Spitting Glass?

My finace says this is a really common dream, but couldnt remember what it represents.

In my dream I, for some reason, was chewing glass and spitting it out…..and as hard as I tried I couldnt get all the glass out of my mouth. Then I actually felt pain in my dream as the shards of glass got in my hands and feet. I had to pull them out.

It was odd, to say the least. So can anyone offer any insight as to what that dream means?