First off I would recommend that you stop soaking her. Soaking BP's is very stressful to them and really doesn't benefit them at all. (it can even dry out their skin and cause a bad shed)

If your BP really is 7 months old, fuzzies are way to small. You want to feed a rodent that is slightly bigger than the widest part of the snake. (how often are you feeding?)

What are you using to heat the cage?

What are you using to measure temperatures?

What are your current temperatures?