Iv just turn 40 the other week and since i was about 15 iv been having the same dream, ,its just a black space , no walls or nothing, just blackness, my heads in the middle of it,( just my head , nothing else) and i get a big ball of chewing gum stuck in my mouth,,, that's it really,,but it feels real, like in the morning in not sure if it was a dream or real(false wakening),, iv had loads of them , and some others exactly the same dream but my tooth feel out,, and another one were my bottom lip gets caught in the gap between my teeth,,also they are false wakenings,, i actually told someone about what happened with my tooth and them realized it was just a dream and never really happened,,,when i was very young (3 to 10 years oldish) i used to have exactly the same dream with my head in a dark space, but i remember seeing a thought bubble with a butcher and a big knife,,, there the only dreams i remember wheni i was young,,