Multiple Breast Fibroadenomas - best coarse

I am 39 yrs - and living in philadelphia -
Over the last 4 years - they seem to find new fibroadenomas everytime they do ultrasound - they are following them - every 6 months w/Mammo and Ultra. A couple of days ago - I was told the margin of one of them is changed and they need to look at it - with the options - take it out or biopsy - which they are recommending biopsy. They also found 4 cysts (largest 0.75cm).and one other new fibroadenoma at the same time - 2 days ago.

My question and confusion are -

1. With multiple fibroadenomas - is it more likely to miss any precancerous changes?

2. heard about Cryoablation - how successful is it as compared to surgery - interms of recurring or the left tissue (killed tissue?)

the largest mass is 1cm so far. Are precancerous tissues - candidates for cryoablation?
3. Is there a reason - or any predisposition for getting fibroadenomas every few months? There is no family History of cancer in my case.

What are the side-effects/ drawbacks or things I need to consider for cryoablation - of fibroadenomas? Could I get them without biopsy?

I am kind of lost and would appreciate someone to help me answer these questions.