Unfortunately it's going to hurt like heck for a while :( I was crossing a stream once with my dog on a leash, just as I stepped on a slippery rock he pulled and made me fall right on that rock on my tailbone... owie.. I was on the first day of a 4 day vacation and had to continue on (well didn't *have* to but as I rarely get to go places on vacation I was determined to) , it was horrible. It hurt for WEEKS after though. There isn't a whole lot you can do except take it easy and sit gently :(
Unfortunately, a doctor can do little for a bruised or broken tailbone, except prescribe pain meds or anti-inflamitories. It may take a very long time to heal; I broke mine 7 months ago and it still hurts. My doctor said it could last up to 2 years!! I've and ibuprofen worked best for me, as well as a "doughnut".