Waiting for Biopsy Result...Worried Sick

Hi Everyone,

I'm feeling really scared and kind of lost and I stumbled upon this community. I'm 41 years old, last week I had my first screening mammo. I have a family history of a maternal grandmother with breast cancer (but not until her 80s and it may have been lung cancer that spread to her breasts, the details are kind of sketchy) and an aunt with some kind of gyno cancer possibly ovarian cancer in her 70s (again details are sketchy). My cousin who is 58 was recently diagnosed with breast cancer though. My Mammo found Nothing concerning with right breast, but they found a small ( about 9-10mm) "oval circumscribed mass" in the left breast and as well as "a separate less focally conspicuous asymmetry in the outer left breast favoring summation of fibroglandular tissue". I was called back for an ultrasound. The US showed a hypoechoic, lobulated mass with no internal vascularity. No additional suspicious mass or cyst on the outer breast. The Radiologist who evaluated my ultrasound referred me for an ultrasound guided biopsy, said she was 95% sure isn't wasn't something bad but the only way to know for sure is with biopsy. I was given a Birads 4A. I had the procedure done today and I'm a wreck. I have 2 small kids (2 and 8), one currently being evaluated for autism and my mind just keeps going to the worst place possible. I can barely hold back the tears when I think about my kids. The US tech told me the Radiologist who referred me for the US is particularly eager to prove things are benign and that there are other radiologists at the same practice who would have classified this differently and recommended a recheck in 6 months vs a biopsy, but I really don't know what to think. I just feel scared and I don't know how I am going to get through the wait for the results or how I am going to cope with bad news...I just feel sick. My husband says I should be optimistic because it is more likely to nothing bad, but I'm having a hard time seeing it that way. How worried should I be right now? Am I over reacting? On a good day I have anxiety and right now I'm really struggling.

Thank you for listening.