From looking at your other posts,a vet said she'd probably foal in a couple of weeks from the 5th? The person you bought her from said she could not have been pregnant, then changed their story & now don't answer your calls? Have you found out anything else since the 5th of this month? You said something about her "passport"? Did you mean her registration paapers?
If you looked at any other foaling threads, you may have seen the pictures of mare's bellies, udders, & vulvas. Take a look & see how your mare compares. Or take pictures & post them here if you can. We need more information to help you.