My mum broke her tailbone and she sat on one of those high cushions with the bit cut out right where your tailbone goes so it is not actually pressing on anything. I hope that makes sense. I have also heard that it is not uncommon to break your tailbone giving birth. Don't know if that's true or not but I do know some people who have and I don't think there is much you can do about it. Try to get one of those cushions. Mum couldn't sit down without it. I actually think they went to clark rubber and get the stuff anf made one but you can buy them too.

I hope you are feeling better soon.