I was diagnosed with BC of the left breast December 16, 2011. I also had a lot of anxiety on making the decision to get a lumpectomy or mastectomy. I chose double mastectomy with reconstruction for a couple reasons. First of all, every time I went in for a mammogram I needed a biopsy. They ALWAYS found something suspicious. I was tired of this and figured...no boobs, no mammograms. Second, I did not want radiation. I was told that if I had a lumpectomy I would definitely require radiation. Those were the reasons I chose mastectomy vs lumpectomy. Did I make the right choice? I still can't answer that with 100% conviction but since I can't undo what has been done I guess I am okay with my choice.
This is really a VERY personal choice/decision. You need to do what is best for you.
Listen to your gut....it never lies.