It's sounding a little too easy to me and I am wondering if you are inserting the balloon too deeply. It is easy to stretch when the balloon is all inside as there are many folds in the vagina. You should only be inserting one third to one-half of the balloon so you are stretching the entrance to the vagina only, and this is harder to do. Also there is no connection between the number of pumps and how big the balloon gets. After 10 minutes of holding the balloon in, when you stop holding it it will pop out and then measure it on the measurment card and you will see how much you have progressed.