Broken tailbone

So my boyfriend took me on a surprise date yesterday to go skydiving and it was all awesome until we landed wrong and now I'm positive I have a broken tailbone. I know the doctors can't really do anything to help with it besides give me a donut to sit on and I'd really rather not fish out a bunch of money if I'm not able to be helped so has anyone ever sustained a broken tailbone before and if so how did you know it was for sure broken?