hi Janie,
forgive me for not reading through your entire post. eye issues.

I had breast cancer, was dx'ed March 2015.

I don't know why you are taking estrogen(my apologies, have not been on forums much lately) but my medical oncologist gave me 3 reasons, potentially, why I got BC and one of them was using HRT for menopause. The other two were being on birth control pills in my younger days and not having had children. I am not really sure why he told because it is moot at this point.

I was stunned when I was told I had breast cancer and if I had my life to live over and know what I know now, if the doc was correct, I would have used another method for birth control and not done HRT.

You are smart to research and take matters into your own hands.
I wish you the best Janie.
Diandra