this is the one thing NO ONE told me about when I had DD#1. I talked to docs, my mom, friends, relatives, people in my birth class who had babies before me... no one mentioned this aspect of post birth.
For me, this was worse than giving birth. Sorry- I don't mean to add more stress to the situation
I have been on a 'bulking agent' (ie Citrucel or Metamucil (my fave of the two)) for near my entire pregnancy, and I will be taking it up to and beyond birth just to make sure I'm staying 'regular'. I do NOT want to go through that 2nd birth again.
Drink lots, apple juice, OJ, hell, try curry now too...
Take a bulking agent, and maybe check with doc to see if you can take one of those daily 'help me go' tablets for women, or use ex-lax.
Good luck to you Jess, I almost wish I was in your shoes (cuz then I would have already had baby

).
I'm getting very DONE being pregnant. lol