Blimey, this thread moves fast! Will come back and read fully, but I just wanted to answer joskar about SPD. I had it with my 1st pregnancy, and walking or twisting often felt like I was being stabbed!
I found that bump bands etc helped, although more with the back pain. Try avoiding too many movements that twist your pelvis, or pull your legs in different directions, like big strides, or trying to get a heavy shopping trolley to turn. A plastic bag over the car seat makes it MUCH easier to get in as you can sit down facing outwards, then lift your legs in and spin round to face the front, keeping your knees together. My hips are getting a bit achey again now at nearly 24 weeks, but I've been doing the buddha bellies yoga dvd and so far it's been helping. Don't over stretch though, as that will make it worse. I also got through paracetamol at a rate, on the advice of my GP. I'd take 2 before bed, then later, before walking anywhere, and in the last couple of weeks, every 6 hours.
The good news is, I don't even remember having SPD symptoms after DD was born, and I've had no problems since, so it all just seemed to snap back into place. :)