ADVICE PLEASE BREAST BIOPSY

Hi I'm a 58 yr  woman who's just had a call bk for another mammogram, also had ultra sound and core biopsy as a suspicious lump was found, I'm trying not to have any negative thoughts but is it possible for it to be a fibroadanoma at my age??  I had one over 15 yr ago but it had shrunk and wasnt showing in mammogram 3 yr after, I'm just wondering if I could  get another with me being 58 as I been told it's in common of women my age x