Hi, for 10months now I ve had bad tailbone pain whenever I was sitting or worse from sitting to standing. After a month I went to dr and had ct scan done which showed bony erosion 4th & 5th sacral segements with anterior cortex soft tissue thickening my doctor followed up with a bone scan but that was fine so nothing else was done, it has now been 8-9months now and the pain is extreme. My feet often go dumb when I am able to sit, and my bowel movements are thinning. Pain is now radiating both up and down and feels like my whole pelvis is aching. I am a 30 year old dance teacher. No falls. 1 child. 1 operation of full hysterectomy with ovary removal during labour complications plus blood transfusions. Currently take 1mg oestridiol ( HRT) daily. I have a mri booked for next week, I am in a lot of pain though and considering going to hospital, should I be concerned or not?