5 months pregnant and ultrasound found clusters of masses in breast going for biopsy SO SCARED.

Hello I hope any of you can help me I AM SO SCARED. I had a breast ultrasound done 4 months ago on a tiny lump which after biopsy was determined it was a fibroidadenoma. The doctor told me to come back in 6 months for a follow up ultrasound just to determine stability. I am 5 months pregnant now and I went back today (4 months later) for the follow up ultrasound and the doctor told me that the tiny fibroid has not changed in size but that my breast has changed so much (its like a new breast) and I have clusters of masses that he can't tell if its hormonal from the pregnancy or something else so he wants to do another biopsy of the entire area. I am really worried this could be BC. Could it be possible in 4 months that cancer can proliferate like this?

Also I have had three doctors check my breasts every single month during pregnancy and no one found anything particularly worrisome in my breast. I am so scared.

I'm not a doctor but I would lean more toward hormonal. Pregnancy does so many weird things to our breasts. Another biopsy to make sure will be the only thing to put your mind at ease. Try not to worry too much although I know it is hard.

This is what I read--http://breast-cancer.ca/brosis-oid/