Alrighty, then! You have come to the right place! Welcome to the forum!
Glad to have you as a new member!
No fitness program will outperform a bad diet. In simple terms, the P90 program can expend a lot of energy, and can work on its principle, but one has to have a structured diet to support tissue loss within this program to make it effective (if this is the goal).
Tissue loss can some times be a complicated subject matter with some women due to the variances in hormones and other biological considerations that do not effect men.
Woman carry more fat tissue for many reasons (related to child birth, and other biological considerations), and can sometimes bring a different sort of circumstance for some. Most women (on average) develop fat tissue gain on the hips, thighs, and buttocks. When it comes off this is primarily determined my individual genetics. Though I have read some medical articles lately that specifies localized tissue loss, it is so small or insignificant that its not worth a consideration. My point is you can not spot reduce, and do not have a choice where the body decides to remove the fat tissue when it needs it for energy.
High energy programs (with or without weight training, such as using body weight training, or circuits with weights or body weight training ) can be effective when paralleled with one's personal goal.
The main thing is if you have experienced tissue loss, and are still experiencing tissue loss, the tissue from the hips will follow, and you will have to be patient.
What have you determined your approximate calories to be? If you have, what sorts of deficits are you carrying? Have you constructed or experimented with different sets of macro nutrients adjoined with a calorie deficit?
If you haven't constructed you calories or macro nutrients, I will help you with this. It is best to lose fat tissue slowly and methodically. And, if the P90 has been working, than I see no reason to change it. If you choose to change it, we can explore many options based on your availability of equipment as access to a gym.
I wish you the absolute best your fitness quest, young lady,
Chillen