Waiting to do Core Needle Biopsy on 11/19

I went in for a screening mammo on 11/9 (this was for my 40th bday).  No real issues but I do have fullness / some minor pain in my right armpit which I have contributed to my coffee consumption.  Back in JAN 2016, I did have a diagnostic mammo for lump I could feel but it was determined to be an island of breast tissue by 2 radiologists and 1 breast surgeon (surgeon confirmed I have a large amount of breast tissue in my armpit).  I got a call back on 11/12 stating that there was 'changes' seen in my right breast and they wanted to perform an ultrasound.  My OBGYN office called the next day to make sure I had received the call from Radiology.  I asked them if they could tell me more about the 'changes' that were seen.  They informed me that there were 2 masses that were seen on the screening mammo.  I went in for the ultrasound on 11/15.  The ultrasound found an anechoic songraphically benign 0.4 x 0.5 x 0.4 cm simple cyst with no associated vascularity.  The other mass is more troubling:  a mixed echogenicity partially circumscribed mass which measures 0.6 x 0.8 x 0.4 cm.  Color Doppler images demonstrates minimal adjacent vascularity which they are calling 'mildy suspicious'.  Of course the radiologist didn't give me all of the details...I went to medical records and got them for myself.  He just told me that the cells in this particular area of my breast seem to be 'hyperactive' and I could wait for 6 months for another scan but based on how nervous he knew I was, he said we could definitely do a core needle biopsy.  I am going in on Monday for this procedure.  They gave the option to contact a surgeon first but I didn't want to delay the results.  I did reach out to my breast surgeon yesterday that I've seen in the past with the radiology report verbiage and she actually called me 2.5 hours later herself on a FRI evening!  She said both spots are EXTREMELY small and since I have one confirmed cyst the other one could very well be some type of fibercystic breast change too.  I told her in my email I had planned on coming to her for a follow up / 2nd opinion after my biopsy results and she said she'd pencil me in a week from Thanksgiving ( should have my results the day before or the day after Thanksgiving ).  I can't help but google all of these findings on my report and try to read into them more.  I can't figure out if the suspicious mass in taller than wide?  My husband keeps telling me that the radiologist is trying to be thorough and it doesn't mean I have cancer but I am so scared!