I think you should request more utrogestan unless you can't tolerate it. You can also experiment with taking some or all of it vaginally and seeing if that impacts bleeding. Often we absorb better vaginally so if you\ve got a doctor who won't increase the dose, you can absorb more of it and achieve the same that way...
I currently take 300mg days 7-14 and 400mg days 14-26. Of that, 100mg I currently take vaginally and the rest orally.
Before doing this, I was taking it all orally and I was bleeding around day 17-19. It's only my first cycle taking any vaginally and I'm already on day 21 without a bleed yet, it will be interesting to see if I get to the heady heights of day 26. I might experiment by going back to orally next cycle and see what happens - only because I have also reduced my T dose (I was slightly above female range) and have started back on thyroid meds so all these things can also affect cycles.