21jellybeans,
I have 3 children myself and with my first my UC was at its worst. I too had the baxon hicks contractions early and it was a good thing I had a gynecologist that specialized in complicated pregnancies. Well those contractions had me dialating very early so I was put on immediate bedrest from 5 months until the end.
I too worried about having an accident on the delivery table but once i went into labour I had many bowel movements so things were cleared out before I started pushing. I did not have any epidurals for any deliveries.
I did use enemas throughout my pregnancy.
Are you taking any probiotics daily?
What about a fiber supplement like Metamucil to firm things up? Both are safe during pregnancy.