Are Progesterone Suppositories Advisable To Avoid The Growth Of Cancer Cells?

I had breast cancer surgery two weeks ago. It was small, contained, has not spread. My DNA tests are negative. I do not want to have radiation and I m on the fence concerning the estrogen blocking regimen of 5 to 10 years. Should I have my hormones tested to see of my body needs projesterone to help block the estrogen from multiplying any possible future cancer cells?