Biopsy results

I went for some biopsies to my breast last week and the breast care unit have rung me today and made me an appointment this Thursday to get the results. Obviously I'm worried so I asked if they could give me the results over the phone to which I was told no. She said the appointment shouldn't take any more than 30 minutes. Should I assume that because the appointment time is so short that there's probably a good chance that nothing was found? I'm just thinking that if it was bad news and further treatment was required it would be a longer appointment?? Any advice would be greatly appreciated, thanks