I am 55 and 2 months ago I fell down really hard right onto my tail bone. I have always had a large protruding tailbone. At first it was still large but felt bruised. Anyway, I started to notice that my spine and lower back started to pop and crack when bending or even going up stairs. It was loud, almost like firecrackers going off. It isn t really painful, but not comfortable. Then I noticed that my tailbone has almost disappeared. It is so small now. Again, it doesn t really hurt. It aches at times and there is like a full, congested-like feeling in my lower belly and pelvis. Achy. Almost like cramps. I exercise almost every day, but certain movements are very uncomfortable due to the popping...it sometimes feels like something is shifting. I had X-rays done last week and the doctor says they are normal. But how can that be? Something is certainly wrong. :(