Unusual bleeding is by far the most common complaint in HRT, I'm post menopausal by 3+ years and I bleed on HRT when I'm not meant to every single month!
I was told any bleeding within six months of a change in HRT is expected, any unscheduled bleeding after that time should be investigated and they recommend you ask your GP to refer you for a scan to look at the lining.
Some areas will do it within a couple of weeks, other NHS regions will keep you waiting months, it's all about where you live.
Our health trust hasn't been able to employ a gynaecologist since the last one went back to the EU (she was lovely) so I had to be referred to a neighbouring health trust.
My friend who works as a nurse in our local hospital told me that one gynaecologist covers five health trusts with her menopause/HRT clinic. It's incredibly stretched.
If I was doing it again I'd phone ultrasound direct and pay about £145 for a scan done some evening, much sooner.
The NHS gynaecologist I mentioned does her own private clinic as well, many only work part time for the NHS now and moonlight for a bit more money. She was £300 to be seen sooner.
I had started bleeding a few weeks after starting HRT, was told to wait for the six months to pass, then on the seventh month they put me on the waiting list which was 8 months long, so I was scanned in just over a year and all was good.
I hadn't known I'd wait so long.
The bleeding continues...
