her/neu need information

Hello my mom was recently diagnosed with breast cancer. she had a lumpectomy and an axillary node dissection but needs to go in for a reexcision on tuesday. The main issue we were concerned about is that she got a biopsy which reported that the cancer was her/neu positive (2+). we heard that and became even more terrified. However this report was done at stony brook's carol baldwin center. my mom ultimately went to sloan kettering for the lumpectomy and they reported that she was her/neu negative. the doctor herself was confused by these results. we are waiting for the fish test results to come in. we have been waiting what seems like 2 weeks now ( literally). has anyone else had this experience? and how long does it take for these results to come in? any help with do. thank you so much for any information.