You should be ok, just make sure you follow the directions with the PAM (it is a very dangerous chemical not to be messed with)
In the mean time remove everything from the cage and clean it very well. then set the cage back up with a very minimalistic set up like so
Paper towel substrate (makes it easier to see the mites and doesn't let them hide in the substrate and help speed up the mite eradication process) 2 hides and a water bowel. (If you use half log hides don't use them right now because the mites can get into them and make it take longer to solve their problem.
2 times a day (morning and night) you should soak your BP in warm water (water temperature in the mid to upper 80's) with a drop of Dawn dish soap. this will help relieve the irritation and get the mites off the snake. this alone won't solve this issue but will hold you over until the PAM gets to you. (continue doing everything I just said until you are 100% sure that all of the mites are gone)