Suggest Treatment For Head Pain And Numbness

I have a feeling of a "heavy head". The base of my head gets numb if I lay on it the wrong way. I have upper neck/lower head pain & numbness. I can't lower my head to my shoulders. I hear a cracking/crunching sould when I move my heard around. I have pain from time to time which to me feels like a pulled muscle in my shoulder area. What can this possibly be?