Hi all

I have been having irregular periods for around 3-4 years now and then had a heavy period that lasted around 8 days, 6 of them the heaviest it's ever been. I was worried Tamoxifen caused it as I was taking that for breast cancer prevention, so called the Dr. Dr sent me for an ultrasound, the report is as follows

The anteverted uterus appears normal in size, outline. The echotexture is heterogenous, with no specific fibroids seen. The endometrium has irregular margins, measures 9.2mm at its widest. The texture is inhomogenous with a vague focal area of 6mm, noted towards the fundus? clot? polyp?

My Dr said at 10mm they would refer but did it anyway due to the iregular margins. I have tried googling, but it's pointing to horror stories. My Nan died of uterine carcinosarcoma

Dr queried endometrial hyperplasia when sending me for the scan

Does anyone understand why the echotexture is heterogenous? What is 6mm and what can cause iregular margins pls, ty (I'm 43)