Waiting for results of a biopsy.

Hi, I am currently waiting for results from my biopsy. Ive also had 3 mammograms and an ultrasound which have all come back with category 3, which is why the biopsy was done. The nurse said it was a hard conversation to have because if it had come back as category 1 or 2 it would have been a definite no, if its a 4 or 5, its a definite yes, but a 3 is only a possibility of breast cancer. Does anyone know what percentage of women are told it is a positive result following this? I go back on Wednesday for the results but I'm starting to get myself in a panic. Thank you in advance xxx