There has always been a link to HRT and breast and gyn cancers.
If you are taking HRT I think you should have already become comfortable with your decision to do so and accepted there would be a small risk.
It's all about quality of life isn't it? If you are feeling well on HRT why would you want to stop or worry?
In my case I have the reverse situation.
My surgeon wanted me to take HRT because I don't have my ovaries, as protection for my bones and general wellbeing. However I feel so ill on it that I am not taking it because my overall quality of life is better without it. Hey-ho
If I were you I wouldn't worry too much.
The papers are always full of scare stories and what will kill you one week is the best thing ever the week after!
janet c