Worried about womb cancer

Hello, I am new to posting, I just wanted a bit of advice. I have been suffering with irregular periods for the past twelve months - literally have four months with no period then prolonged bleeding for weeks on end. I had a massive bleed that required me to go to A and E and I was subsequently sent for ultrasound and internal scan. The results showed that I have got small cysts on my ovaries that the consultant said were no worry, even though one was bleeding. However I was also told there was a small lump in my womb that they didn’t know what it is. I am booked in for a hysteroscopy with biopsy and possible removal of the lump under general anaesthetic in two weeks. I am worried sick and wanted to know if anyone else had an unidentified lump and what it was. Thanks