Profilatic mascetomy

Hi all, My name is Belinda I am a 32yo mum of 2 boys I was diagnosed with triple negative breast cancer in late October 2012, I have have 4 cycles of ac and have 2 cycles of taxol left out of the 12 so nearly fin chemo yay:). I had a lumpectomy and sentinel node biopsy, nodes were clear, than had a further re excision as the margins were too close. I have had genetic testing but do not carry the gene, and have been booked in for radiation to follow chemo but am still considering bilateral mastectomy and reconstruction instead my oncologist is just recommending the radiation but I am not totally convinced does any one have any advise ??