I guess anything is possible but I also know that it is possible for baby to move back out IFYKWIM.
Just remember that every women & baby is an individual & will do it the way they see fit. Plus once you hit 37 weeks thats classed as full term & baby is welcome to make an appreance at any time!
If you are concerned about the B/H go & ask to sit on the monitor for a bit to see whats happening.