Aw, I’m really sorry to hear that you’re having such a hard time!
I don’t really know what would help you, but I have heard that a couple of things might help…
1. a pelvic support belt (ask your dr)
2. ice put over where it hurts
I dunno if those would work, but I guess it might be worth a try.
I don’t know if you have any pregnancy books that have suggestions for excersizes or different positions that might help with the pain in your coccyx, but you could look into getting some kind of guide or whatever.
I’m sorry I couldn’t be more helpful! I hope that the pain gets better soon!