Looks like she is filling her udder and her ligaments around her tailhead seem droopy. Normally her udder will continue filling until you could see it sticking out behind her back legs in that last side-view photo.
Do you see movement of the kids on her right side? The get in position and then stop moving 24-48 hours before kidding (supposedly!)
Have you seen any discharge from her vulva? You can begin to see discharge up to a week before kidding.
My best guess would be 5-7 days until she kids but that is really a guess!
When did you get her, or when was she in with a buck?
Usually they start getting an udder 6-8 weeks before they are due.
I always go by udder, and tail ligaments, those are typically the best signs. Some will get a very sunken in look in the hips and tail area as well.
Watch for any changes in her attitude too.
Do a search and find how to feel for her ligs. As said above watch for attitude change...basically anything that makes you say she's being odd today. The white discharge is normal and really doesn't give you a idea of when she will kid but if it goes to a clear amber color you are close....like hours. Good luck kidding and I hope she doesn't keep you hanging too long.