Biopsy report of HER2 test. Any serious.

We got HER2 report as "MICROSCOPIC EXAMINATION & IMPRESSION Infiltrating duct carcinoma High nuclear grade NRBM 3+2+3=8. Grade - 3(measuring 5.5x5×2 cm) Lymphonsular emboli and perinueral invasion not seen PT3. IHC ER Negative (internal control positive) 0% - PR Negative (internal control positive) 0% - Cerb2 Negative (Score)  0% HER2 IHC Scoring criteria in Breast Cancer: IHCO (Negative) No reactivity or membrane staining <10% of invasive tumor cells. IHC1+ (Negative) Faint/barely perceptible membrane staining barely perceptible membrane staining in >10% of tumor cells: cells only stained in part of membrane IHC2+ (Equivocal): Weak-to-moderate complete membrane staining in >10% of invasive IHC3+ (Positive) Strong complete membrane staining in > 10% of invasive tumor cells." And after surgery removed breast and nodes biopsy report got as tumer free. Do we need further treatment, is there any serious.