I can sympathize!
I wish I could tell you that there was something that I did that made it better, but there wasn't. Hot water bottles/baths were about all I could do, and of course, that only helped a little bit, becuase I couldn't tolerate the heat very long!
I hated life the last 6 weeks or so of being pregnant. Everything hurt down there. Walking, peeing, "rolling over" - I can't call it rolling since it's a 27 step process with a belly that big!, even sitting sucked with not being able to cross your legs (that hurt to try too!).
So I don't have any suggestions for you, unfortunatley. Just wanted to tell you that I've felt your pain!