Oh Kim - big hugs for you. its all completely normal I'm afraid I had Jenna bumping in and out of engagement for several weeks, and its so uncomfy.
Its certainly worse when you are moving around more - like walking, but then its also not too good for you to just blob out for the next few weeks either.
You could try and get some relief from a physio/chiro/osteo or someone similar. You could also try applying some heat packs to the general area. Warm showers or baths help, and if its really bad, dont be afraid of popping some panadol or even panadiene. You also might want to get out the fitball and do some sitting on that, try some of the labouring positions as they might also provide some relief for your muscles/ligametns.
The next few weeks wont be easy, but you'll get there.