Yes I've heard of this. It's up to you if you want to have it done. You can also make lifestyle changes - I know you smoke and drink occasionally but it would be best if you stop. Also follow a lower fat diet and take vitamin D - at least 1000mg daily. Sorry you have such a strong family history (((salukigirl))). I hate mammograms - they're very painful for me and I'm not a wimp but I have dense brest tissue.