Hi Solo,
I'm wincing in sympathy..so sorry this has happened at this time of year, but there's never a good time to crack the Coxyx.
Yes, I have done the same thing before. I received a knee to the butt in 1984 whilst playing rugby and that did a great job of cracking and splintering the bone.
Good news is that it will heal with help from that lovely donut support, just be prepared for all sorts of whoopee cushion jokes and pranks like someone pulling it from under you as you go to sit down. Hilarious and painful!
Still to this day, my Coxyx will ache in a dull pain fashion if I sit too long on a plane seat for example. I also recall taking a while to turn over in bed, get up in the morning or get up from a sofa...I'm sure you're discovering that too.
Hang in there and take it easy. Hope you get some relief over the Holidays.
Nigel
p.s. Thanks for all your postings and shares in 2008. Illuminating and inspiring.