I agree with the above posts. It really takes a minimum of the second pack of pills to have any kind of idea as your body gets adjusted to them. I hear your frustration through with the breakthrough bleeding and changes in the interim, but it is a just a matter of time to know for sure. Be sure to take them as close to the same time every day as possible, because if your system is sensitive to the hormones, delaying or missing pills can cause breakthrough bleeding as well. Hang in there.