I have coccyx problems, and have had since a skiing accident when pg with ds 5 years ago ... I'm also suffering with it in this pg (just like with ds), and also have spd - so bear that in mind when you read the following:
Here are my handy hints and tips
for when pg:
*try to sit with you bum hanging off the bottom of the chair ... if that's impossible, then make a cushion with a coccyx cut out - you can either buy funky wedges made out of foam, stuff a sock, get an inflatable travel pillow, or a swimming noodle and sit on that.
*try to avoid sitting in one position for any length of time.
*I find sitting on a gym ball more comfortable than sitting on an ordinary chair
* get yourself a referral to a women's health physio pdq! They will be able to give you exercises to help with the coccyx pain.
* if at all possible donotlabouronyourback - keep as upright and mobile as possible - if your coccyx is knackered, it may well get in the way of your baby coming out!
* try positions that involve you kneeling - and if you are getting real coccyx pain when contractions are on, try doing a few sat on a loo seat..
Don't think mine's bent, but it's been very painful since about 24 weeks (now 28 + 6). Gets worse when I'm at work if I sit a lot. I spoke to our H&S person and she's got me a wedge-shaped cushion with a cut-out bit which takes the pressure off - might be worth speaking to your work to see if they can help? It's definitely helped me.