Hi Lana, I would expect that colon cleansing in the form of enemas and colonics should be beneficial for you. The most gentle enema would be 3-4 pints of warm (103 degrees F at preparation time) Sea Salt solution. Use one teaspoon of Sea Salt per pint.
For information on how to take an enema, see the following links:
Additionally, the link below has some information that will probably not come as a surprise to you discussing the link between constipation and breast cancer.
Petrakis NL, King EB: Cytological abnormalities in nipple aspirates of breast fluid from women with severe constipation. Lancet 2: 1203-1205, 1981.
In this report the authors define "severe constipation" as two to four bowel movements a week.