Worry of womb cancer

I have had 3 episodes of unexplained bleeding after no periods for 3 years. I was red flagged on 23 April by my GP and had a failed hysteroscopy on 6 June with no anaesthetic. Tried again under general anaesthetic on Thursday last week but could only reach 3-4cm into cervix due to adhesions (I have only had one pregnancy /child). They took samples from the adhesions but have no explanation for the bleeding. They also had a borderline/ false positive pregnancy result with my urine test beforehand. Now in limbo and very worried (single parent to a 7 year old).