Haven't read all the thread yet but you may want to note my thread as I've just introduced a tiny amount of estriol cream and have had an unusual early and heavier bleed.
It's always nervewracking the 2 week cancer pathways, but we have to remind ourselves that this is a standard that our health system gives us for checks and that in most cases it is to rule out cancer. Bleeding at the wrong time can happen for many reasons but as it is also a cancer symptom they just have to follow protocol and run the checks.
Let us know how you get on, I do feel it will be the changes to your hormonal treatment, these things are stronger than we realise