HRT

Triple positive means, in part, that you do have an excessive amount of both estrogen and progesterone in your body. That's what caused and fed the cancer. Taking a hormone supplement could increase your chances of recurrence or a new cancer. Have you been prescribed a hormone suppressor (an AI or Tamoxifen)? Taking a hormone supplement would, at best, counteract that, and could have much worse consequences. I can't imagine any reputable doctor who would prescribe a hormone supplement for you.

I'm confused, how can triple positive not mean it's also positive for estrogen and progesterone?

Oh, guess I got confused by the +++.

HRT has been linked to increased breast cancer risk so even if you are hormone negative, it doesn't mean you couldn't develop a new/different breast cancer.

If you don't have your uterus, you could consider tamoxifen; it acts like estrogen but blocks estrogen, except in the uterus...crazy how bodies/drugs work.

I would certainly avoid systemic hormone replacement therapy. Depending on symptoms, there might be other things that would help. For instance, some physicians will allow use of vaginal estrogen.