Has anyone here used one? Both my dentist and my ENT doctor suspect that I clench or grind at night, because I have developed sensitive teeth/receding gums and also have TMJ symptoms. Both suggest getting one of those custom-fit mouth guards to wear at night. But wouldn't it be reeeeeally hard to sleep with a big huge plastic chunk in your mouth?? I shudder to think of the drool puddles I'll wake up in. If anyone can share their experience with night mouthguards, please let me know. (i.e. how long did you use it, did it work, were you able to sleep with it, etc) Thanks so much!