I did have something similar in that a couple of lumps were found after I found 1. 

I had a mammogram, ultrasound and had to go back and have a core needle biopsy of 4 lumps. At no point during the ultrasound was I given any indication of the possible outcome. 

The results came back in a week and I got a phone call to book an appt with the consultant to discuss my results the following week. 

That was yesterday. Unfortunately 3 of the lumps are cancerous including the one in my armpit and I'm now awaiting a date for an MRI to look at the tumours in a bit more detail before surgery in the new year. 

I had prepared myself (despite no-one giving me any indication) that it would be cancer so it wasn't too much of a shock. However I think because I had spent the whole week in limbo but kinda knowing at the same time that when I was told at least I knew for definite so I could start putting things in place for pastoral support for the kids and notifying my employers. 

Fingers crossed but we are here if it's not good news

I'm so sorry to read this I wish you all the best.  It's such a scary time and I can't believe you have to wait to find these results out.  I'm praying they need to see me just to remove the fibroadenoma and it's not cancer.  I too am preparing for worst case scenario like you it's my way of dealing with things.  On a positive note it's amazing what they can do now.  Xxx