A scary time. I have been there.
I think it depends who told you they thought it was cancer. An experienced consultant radiographer would not say that they thought you had cancer unless they were pretty sure. I was told by a consultant radiographer just from a mammogram. Although it was shocking I actually preferred that someone was upfront with me and let me get used to it before confirmation through the biopsy. Cancer is also a very broad disease and so being told you probably have cancer can mean very different things. Wait for the biopsy results but my view is that be grateful that medical staff are prepared to be upfront. If of course they are wrong then go out and have a very big glass of something to celebrate.