Same thing happened to me. Boobs shrunk from a firm, full D to a soft C. I did not lose any weight other than the boob weight. They were originally 7 pounds total (I’ve weighed them) and now they are 3 pounds total. Not only the size but the weight and feel changed completely. Took it out and they haven’t grown back.
Well, probably from now on, go ahead and take them as prescribed. That's important. Once in a blue moon, you could skip the spotting of placebo week but if you are running out of pills and they will not give you more, then you need to follow the directions of your prescription. In the mean time, if this happens and you need your pills, you can call your doctor and explain the situation. They may help you out. It's not like it is an addictive drug you are abusing. :>) So, just talk to your doctor but they will likely encourage you to take it the way it's meant to be taken on a regular basis.