I feel like I have sand or very small pieces of gravel in my neck. Any time I move my head, I can hear it. Crunch, crunch, crunch. It doesn't matter if it is up and down movement or side to side movement. It always sounds crunchy. It seems like it is focused right at the base of my skull, where my skull attaches to my spinal column. Does anyone else hear this or am I just crazy? (I guess those are two separate questions, but I hope you know what I mean).