I have heard of people who have broken their coccyx bone and it has healed slightly inwards, which means that when a baby is born, it pushes the bone outwards, often breaking it - so it might depend on how it heals? Hopefully it heals outward.

My disclaimer to this is that I really have no idea, and am just passing on what I've heard. Maybe at some stage you could get an xray to see where things are at? Hope the pain stops for you soon.