Pre-diagnosis support

Hello, I had a breast cancer screening yesterday after finding a lump the size of half a grape in my left boob. A clinician did a physical test then send me back to do a ultrasound then a biopsy. The people doing the biopsy said that I would go back to see the clinician to book my results appointment. I didn’t expect any kind of results today so was completely shocked when the clinician told me that they high suspect it was cancer. I ask them if they were sure and they said they were pretty sure but needed the biopsy to confirm the results. They said I would be booked to see the consultant to discuss the results and treatment. Is it usual that they can tell you during this appointment without biopsy results? They said my lymph nodes looked fine, is this a good sign? Should I prepare myself for the worst or is there a chance they could be wrong? Any support would be great as I feel like I’m spiralling and feel so useless not knowing anything.