I totally understand where you are coming from. I had my biopsy mid September, got the results 5th October and I'm almost insane, I said to my surgeon physically we have time but mentally it's no good.
I am now so comfortable with my decision to do a double mastectomy, it took a while to come to that conclusion but here I am. I am have a skin sparing mastectomy with implants, my PS showed me his work and to be honest they look pretty good. Once this is over I don't even have to ever have a mammogram again. Have a good think about it because it needs to be your decision but you're not much older than me and we have a lot of living left.
I'll give you my verdict post op! ;)