I have scattered fibroglandular densities and 3-4 lumps axillary. should i be worried. breast cancer history on mom's side.

No: If the physicians treating you were suspicious, they could perform a biopsy of the suspicious areas in the breast. Lymph nodes are swollen for a lot of reasons, and rarely do you palpate or find a very large lymph node even when there is metastatic cancer.

Breast cancer: You should be seen and examined by a breast surgeon or a general surgeon with breast surgery experience. They will guide you care and explain other indicated studies such as an ultrasound.