Oh dear.. keep a close eye on her.. we find that when they roll a lot, there is usually a dystocia involved in some way. Hope all goes well and keep us posted!
Have you expressed a bit of milk in your hand? I was always able to narrow it down to two days if it was thick and very sticky, or if it turns to skim--foaling happens within hours.
Good luck with Sophie Julie! I'll be watching as much as I can. We are watching a maiden here too....a client mare....that I think is holding off for next CHRISTMAS!