Yes I have had problems with my coccyx area as well for a while now. It is not very pleasant at all and unfortunately there is not much you can do about it. I have a sit down job so I think that is what makes it worse.

As I have a fair bit of sick leave up my sleave I have asked my doctor to write me out a doctors certificate to reduce my work hours from 7.5hrs/day to 5 hours. I find this makes my days bearable now as I am now going home just as my coccyx starts to get unbearable.