Out of my mind with worry. 

I found a lump in my breast about a month ago. I went to the doctors and got an urgent referral to the breast clinic. I'm only 30 so at the breast clinic they did an ultrasound and pretty much said straight away there was "nothing causing any concern" checked my breast and armpits. So I was quite surprised after my ultrasound when the consultant took a sample of cells from my breast. She said it was "mostly to rule anything out than prove anything was there." She said I would get my results about a week later by telephone call and that they wouldn't need to see me again unless the results showed something. She seemed pretty confident it was nothing untoward so I left feeling slightly more relieved.

A week goes by and no telephone call or results back. I started to relax again thinking no news is good news tried to call the consultants secutary and never seen to be able to get through. Now 2 weeks later I've recieved a letter saying I have another appointment at the breast clinic. (it's not for another 10 days, surely if I had cancer they wouldn't wait that long to tell me?!) the letter does not give me any information on why I am going or what will happen when I'm there. Nothing.

My mind is racing & the wait seems awful. Just reaching out to see if anyone has been in a similar situation. From what I've read online most people seem to get told at those initial appointments if it seems to point to cancer so they are fairly prepared for the results. (well as much as you can be) 

Could my ultrasound show nothing untoward & then biopsy still show cancer?

Would they ring me to tell me I have cancer or wait?