I was put on HRT when I was 43 and settled with Everol Conti. I was on this for 25 years, but I found that after flying, this would cause me to bleed for about 4 days. It wasn't like a period, more dry black stuff. Told my doctor who sent me for tests on all my openings, scans, x-Ray's, but they couldn't find anything. The next time I flew it happened again, luckily both times I had some Tena Lady pads, not because I've got a weak bladder but I can't stand sweating in hot countries. I didn't rush to the doctors but told her when I went for my review. She said it was quite common but suggested I went on Fem7 Conti. These were fine, but they just don't stay on, and as they are suppose to stay on a week, I had to find a way to stick them on, which I have. The senario now is that I bleed for a week, off for a week, on for a week. Just like before, it's not a heavy period but at least on these patches, I do have more energy, and I don't get an aching stomach. I have an appointment next week to see my doctor as I'm trailing these out and she needs my feedback. I'm also lucky in that she lectures about HRT so unless I stay, she won't take me off them as it's more beneficial as you get older and I can see the difference between myself and my sisters who are no longer on HRT. I'll see what she does say, but these Fem7 Conti patches I think should be changed twice a week like the Everol Conti have to be. I will ask if there's anything that will stop these bleeds.
Update: went to doctors who has put me on tablet HRT which I take st night daily. It's for the over 65 year olds so this should now stop any bleeding. No ill effects yet, but sleep much better.