my sister is 37 weeks and 2 days pregnant pretty sure she just lost her mucus plug... she also having pain and pressure in her pelvis.... labor soon????
My opinion is that she'll be fine for a couple days in time to get back to where she lives if she's just feeling general pain and pressure. Those last few weeks, that's pretty much the only feeling you have haha. But I'm no doctor and I know some women do progress really fast. Maybe just tell her to take it easy, kick her feet up for the remainder of the visit, etc. :)
I lost mine at 34ish weeks and still was overdue with my first. It's usually not much of an indicator. The pain however may be a sign so I would monitor that at least.