@WartOrNot Please try not to worry.
There are 2 types of menopausal bleeding
1 women on hrt
2 women not on hrt.
The second is the most serious, statistically.
The figures for finding endo cancer in women on combined continuous HRT is tiny. (Those stats are available online.)
It' s far more likely to be an HRT 'blip'.
Yes, you should see your GP asap.
However, there is new guidance for GPs from the BMS on this.
It suggests that drs take women off HRT for a few weeks to see if the bleeding settles. And review at 6 weeks.
Some GPs may still try to get you seen within 2 weeks, but it depends on the availability.
Personally , I think this isn't a great idea simply because many women would struggle without HRT for 6 weeks. it's also possible to have bleeding for other reasons apart from an HRT blip.
But it's relevant that you are aware of how women on HRT are at less risk.
Women on combined, continuous HRT have less endometrial cancer than other women in the population- including women not on HRT.