Breast Cancer - Ductal Carceroma In Situ

Is there any information out there on exactly how benign ductal carceroma in situ of the breast is when diagnosed early? I was told several days ago that there are "changes" showing on the digital mammogram that was taken only 3 months after the previous mammogram, ultrasound and an mri was done. Can things change so quickly in 3 mos, or is it that none of the technology is as reliable as we seem to think. Now i'll have to have my 4th core biopsy. I also had a surgical biopsy, followed by a removal of suspicious tissue that turned out to be bengn. I was told that this was "most likely nothing", that "80% of the growths are not malignant and that if I was in the 20% group, this was caught very early and that it is very treatable.

I am very, very tired of 15 years worth of anexiety, lack of information, misinformation and at this point lack of trust in these machines. I am considering an elective mastectory of both breasts and then a reconstruction. I would appreciate any information on surgeons in palm beach, broward or dade counties in south florida (with geographic preference on central and south palm beach and broward) who specialize in reconstruction.

Thanks