I thought this girl was due last week...her udder is big in the morning and shrivels at night for the past couple of weeks...here is a picture taken this evening...does she look pregnant and if so does she look close to you? Her vulva is slightly swollen but no nesting going on. Excuse her baldness, she blew almost her entire coat and lived in the wading pool last week in the 100-105 degree weather.
I am not up on PBP but she looks PG. But in the hogs I raise-AGH-each individual teat will bag up and hang. If it is a first time girl-most will not bag up until that last few days and the older girls bag up within the last week or so and just get bigger until littering.
You would have a job and a half to cut hooves on a hog. And one that is of any size. Good luck.