Hi Lostit - so sorry you have had such a tough time. Advice does seem to be that if you have had DCIS then oestrogen is not recommended but, then again, reading up on some sites the evidence seems a bit sketchy. I have found this site today
https://breast-cancer.ca/progfacts-dcis/ which gives what seems to be up to date advice. If you scroll down some way you will find this statement
"There has been extensive research in the past regarding the connection between women taking hormone replacement therapy (HRT) after menopause and invasive breast cancer.
survival rates for ductal carcinoma in situHowever, there are very few studies that have examined the risk of HRT associated with Ductal Carcinoma In-Situ. A 2012 study examined 1,179 post-menopausal women with Carcinoma-In-Situ.
The study found no association between DCIS and use of Hormone Replacement Therapy (including estrogen alone and estrogen and progesterone combined therapy). Furthermore, there was no association with current use of HRT or the duration of use of these hormones.
However, the study concludes that larger clinical trials are needed to truly assess if there are any associations between HRT and DCIS.
In addition, the age of menarche has not been shown, so far, to be associated with DCIS incidence. Indeed, it is more likely (3.7 times) for women over 60 to develop DCIS."
It is a Canadian (I think) website but it's worth gathering as much info as possible. Apologies if you have already seen it!
If HRT is not an option have you been offered Clonidine (Dixarit) which is a blood pressure medication but is also good at relieving menopausal hot flushes?
Taz x