Hi Greenfields
Wave! (I was sure there was a wave icon but never mind!)
Do not fret - I am sure it will be something minor.
First thing - maybe you are not completely post-menopausal and your own cycle weakly kicked in and overrode the progesterone? Can't remember how old you are?
Second - can't remember if you are using it vaginally or orally? If the latter then variation in absorption can cause prog levels to fluctuate and if the lining is building up then this can cause some bleeding or spotting. I am assuming this is not occurring in the 3 days off but at some other random time?
Obviously go to your doc as you plan, and if possible they may decide to scan you as you will want to check everything is OK if you haven't had any bleeding/spotting before on this regime? If all OK - I would suggest trying a course of increased progesterone eg during the last week of the 25 days - or if you can tolerate it, double it for the whole 25 days - and then see if that does the trick and also if you have a bleed during the 3 days off - in fact have you been getting one at all? I'm sure your doc might suggest something like this?
Sorry I can't be more specific but is a question of - get checked out, see what doc say, then try increased prog - maybe even permanent regine of every alternate day take 200 mg just to increase the dose slightly?
I'm sure you do not need to change the type of HRT you are using - especially if it is controlling your symptoms - just a bit of tweaking
Hope this helps and glad things are going well generally
Hurdity x