HRT with a history of uterine cancer?

In January of this year, 2009, I had a complete hysterectomy at the age of 32. I had this because I have had uterine cancer 3 times since age 21. My mother, aunt, grandmother, great aunts, and great grandmother all had this as well. I have had a grandmother have cancer and two great aunts on my mother's side died of cancer. I have been on the HRT patch since February. Every time I put this on, I know it will keep me from having symptoms of menopause, but I am worried about it's connection to cancer, especially cancer. Is it ok to use herbal remedies for menopausal symptoms and also take calcium for bone loss? I spoke with my doctor before my surgery about my concerns with HRT and he said there was new research out that stated there is less of a connection between HRT that is only estrogen based and cancer. What should I do?