@MaMelon
I'm not trying to persuade you to go down the HRT route but the advice your GP gave you is not the same as menopause consultants. So, just so you know all the facts here are a few more.
1 Family history is when 2 first degree relatives have BC before the age of 40-45. (That's a mother and your sisters.)
2 Women's lifetime risks of BC is 1 in 8. This means your aunts could have had BC for any number of reasons.
3 only 5% of BC is down to inheritance/family history.
4 Women using estrogen-only HRT have less BC than women not using any HRT.
5 Utrogestan (micronised progesterone) has been shown to be safe for at least 5 years with no more cases of BC compared to women not using HRT.
Specialists now believe that the connection between HRT and BC is that in some women, HRT accelerates the growth of an existing cancer (that would appear anyway in time) but does not cause cells to become cancerous.
HRT Risks
Current opinion is that HRT taken for less than 5 years does not significantly increase the risk of breast cancer but studies have shown that after 5 years of use, there is an association with a small increased risk. Once HRT has been stopped, the risk returns back to baseline. This suggests that the use of HRT may promote the growth of breast cancer cells which are already present if HRT is taken for more than 5 years after the age of 50, in some women; there is no evidence that HRT causes breast cancer.
It seems very likely that different types of HRT are associated with different risk, estrogen alone does not appear to increase the risk while there appears to be a small increased risk of cancer promotion with long term use of estrogen combined with progestogen (combined HRT).
It's absolutely down to you and your choice, but your GP isn't correct to say you can't take it. Ultimately, it's your choice knowing all the facts.
All the best with whatever you decide!