If you have/had endo, you should be on a
continuous progesterone regime !!!!!!!!

Yes, even during peri!!! So that first protocol you were on was totally wrong for you.
I'm so shocked to keep coming across women on FB or other places who have had endo and are on sequential!!!
Estrogen (without progesterone) WILL FEED YOUR ENDO!
Moreover, it can be challenging to get the progesterone right to suppress the endo - and take some expert advice and knowledge. If your doctor doesn't even know not to prescribe sequential HRT to a woman with a history of endo, they probably don't have the knowledge to help you navigate the progesterone.
Often utrogestan isn't sufficient by itself for endo sufferers, to suppress their endo. I am 44yo and have been on Cerazette/desogestrel mini pill for 9 years before I started HRT (it was making me symptom free from endo) and I decided to try stopping the Cerazette at the same time I started HRT.
I was on continuous utrogestan 100mg. After 5 weeks, I got back all the old familiar endo pains in all the same old places. So I re-started Cerazette alongside the HRT and all is now fine. I want to at least try, at some future point, switching the Cerazette for 200mg of continuous utrogestan... but I know it might not work.
Which is all to say, it is very likely that 100mg of utrogestan isn't going to be enough to control endo symptoms. It doesn't stop ovulation. Your ovaries are still functioning and at ovulation estrogen floods the abdominal cavity... For me, endo control means stopping ovulation and trying to provide stable and consistent hormones without big fluctuations.
You could ask to try doubling the utrogestan to 200mg continuously. If even that doesn't work, then you could go back to 100 continuous but add in a mini pill (as I've done) - Cerazette is the mini pill which stops ovulation consistently so the one most often used. Alternatively, you might need to try some of the synthetic progesterone HRTs because often those control bleeding more. Femoston Conti with dydrogesterone is often recommended for endo sufferers and I've heard from a few people now that it has been good for them - although some people need more estrogen.