The best place to look for mites on your snake would be in the fold of skin on the underneath of the head and in the heat pits. For the most part, if there's nothing there then you should be okay, but I'd PAM a little longer just to be safe.

I saw your earlier post too, and if she's still in shed that could be why as well. She could also just be one of those oddball bp's that just breaks all the guidelines we're used to.

Don't panic yet! Good luck!