Had total hysterectomy 9 myths ago, suffering painful flashes ever since. taking oestradiol but worried about long term effects. any recommendations?

Check estradiol dose: If indeed both ovaries were removed and "flashes" and other vasomotor symptoms are very troublesome the benefits of taking estrogens like estradiol at this point (to improve your sense of wellbeing, sleep better, protect your bones) are quite likely to outweigh the risks. The dosage of your estradiol may be insufficient or the route of administration may have to be changed(oral, vaginal, dermal)