I've used Oestrogel through most of my time on HRT. I'm 57 and, apart from a break from HRT because of Breast cancer scares 9 years ago, have been on HRT most of the last twenty years! Oestrogel allows you can adjust the amount according to need, which means you can have the minimum amount to keep symptoms at bay. I used to have progesterone monthly to have a withdrawal bleed but I've had a Mirena coil for the last 4 and half years which has been quite good.
I've got to have the Mirena out soon ( coming to the end of it's life) - this is why I'm reducing my Oestrogel to have a break from HRT. If I want to continue HRT because symptoms are bad, I may do Oestrogel, but use half the amount I have been using, & do Hurdity's regime - she uses Utrogestan, which is bio-identical progesterone, and take it for 7-10 days every 6-7 weeks to give a withdrawal bleed.
I know many women have problems with bleeding on conti HRT and whilst having a regular bleed is not ideal it is probably better to have a planned bleed every 6 weeks than constant spotting and bleeding. If your womb lining was thin then that is good.
Good luck DG x