Suspicious mass on mammogram

I went doctors about a new breast lump, got a 2 week appointment,that lump was fatty tissues but they found something else so had a ultrasound and then a biopsy and they put in a clip ? Went back for results and they said the sample was scatty tissue? And the pathology want another test done ( biospy) but the doctor said it seems OK but we need to check, should I be worried