My tailbone started really hurting at the weekend. It hasn't gone off, despite lots of sitting on my ball rather than the sofa. When I change position in bed it hurts, getting up off a chair or the sofa hurts. Walking and exercise is fine though. Bottom of my back is a bit achy but that's normal - am 23w4d with twins, healthy otherwise.
It's kind of nagging and strangely numb at the same time. Has anyone else had this? What is it? Will it go away?