Another advise needed

So I went to 2 additional mammologists, I got one extra scan. I now have two ultrasounds scans both with bi rads 4, but with more details. I have dense breast, they found on one breast only tiny cysts below 4mms, and in other breast multiple big cyst with smaller ones next to it (in total 4 cysts), 2 solid masses next to it, isoechoic with hypoechoic halo and no visible blood supply and same one isoechoic solid mass 5mm/6mm also without visible blood supply and not clear margins. No lymph nodes swollen anymore (that was related to flu shot I guess). So one doctor told me now to get MRI with contrast, I can do it in 2 weeks because of my menstrual cycle. The other one said to have automatic ultrasound and if it also gives bi rads 4, then get a biopsy. Automatic ultrasound is available only in 1 month. I am leaning towards MRI but I am not sure. Both of them said that "we don't see signs of malignancy" but I guess they don't see signs of them being benign either.. not sure what to do so scared. What do you think? I am concentrating on 'no blood supply', I guess it means good thing right? And also the fact that I have so many cysts maybe means that these are also something related because of dense breast, I had a lot of hormonal fluctuations in the last couple of years after I went off of birth control pills but of course that is also a risk factor for BC... Thanks for your input!