Coco - although I was in a chair (couldn't walk), I slept ok (ish - was on very strong pain medication to help me sleep), thanks to a wonderful arrangement of pillows (dh was really glad when I was no longer pg, as there was space in our bed for him to turn over!
I've also found that it cleared up much more quickly this time, as I had persevered with yoga (and had had acupuncture) throughout the pg. DD is now 6 months old, and I have no regained my former sprightly self.
Incidentally, I had a natural water birth - I was having weekly hydrotherapy sessions at the hospital, and the physio in charge suggested that a water birth might be a good option for me - and she was right!
It was also a vbac - my first birth, I had an induction (and epidural), and ended up having an emergency CS after a failed instrumental delivery - it took me nearly 3 years to get back to normal after that, as I had been unable to feel the pain when in labour, and had done a lot of damage during labour, as none of the midwives who were with me during the birth had heard of ways to help women with spd.
This time around, I was a lot more bolshy (about everything!) - and my recovery has been much better - I am still having some pain when doing certain movements, but, not nearly as badly as with ds.
Also (sorry, this is faffy and rambling!), I bf both ds and dd (dd ex. bf still), and haven't found that it made the spd any worse ... as I said, I think it's the luck of the draw!
Good luck - spd / pgp is no fun - and we have made the decision not to have any more children because of just how bad I am at being pg ... (mind you, I also had hyperemesis with both successful pg, and had 2 mc, so the spd is not the whole story!)