Sorry I can't help but I  am in the same position. Scan on Monday and was told all looked OK but got a call next day to say bleeding likely to be cervical erosion but  lining was 4.5mm so I need hysteroscopy and biopsy. Now worried sick as I know cervical cancer can be mistaken for erosion and  I'm on livial which gives increased risk of uterine cancer. Just hoping it's an annoying coincidence that I have both erosion and thicker lining and that I'm OK.     Did they say why they are concerned? My frsntic googling seems to say that 4.5 to 5 isn't classed as thick just right at the top of normal so slightly higher risk.