Axillary lymph node on Ultrasound

Hi everyone. I had my 3rd screening ultrasound on May 22. I got a call back for compression mammo and an ultrasound, I had this done June 1st and a biopsy was recommended. I had a vacuum assisted US guided biopsy today. When the sonographer scanned me today to find the area gain she scanned my axillary lymph nodes as well. Is that normal? My initial ultrasound on June 1 I was given a BiRads 4. All they said was it was lobulated, slightly ellipsoid and 8mm. I asked for more detail but they couldn't or wouldn't provide it. I would appreciate any input on whether scanning the lymph nodes only at the biopsy is the norm. Thank you so much.

I guess I should add that I am 42 yo and have no family history of bc. Thanks.