KerrBear -
Did your doctor tell you why you need to stop running? I am a runner and I can't imagine not running for the rest of my life!
Also, you mentioned you started having butt problems with your first baby. Where your other pregnancy's bad too? I got my fissure with my first baby and I am afraid to have more babies. I had LIS 6 months ago & it helped alot, but things act up every now and again still. Did you have a vag delivery or c-section?
Did your doctor tell you that you will be staying overnight in the hospital? Best of luck! Please keep us all updated on how your doing!