Worried after biopsy and lymph nodes

Hi, I had ultraspund yesterday and mamogram. A lump is solid and they found enlarged lymph nodes. Had multiple biopsy and now waiting 1 week for results. I am lucky I am under private health care and saw a consultant straight away. He said they are very concerned. My husband is trying to be positive until we know what we are dealing with but I am the sort of person that needs to prepare myself for worse case scenario. As the consultant said we are very concerned a few times I am guessing they can tell from scans it is very likely the C word. Has anyone had a lump and enlarged lymph nodes that had turned out to be negative? I am 38 with 2 young children so naturally feeling all sort of thoughts.  Thanks in advance for any replies