Welcome...
I also went straight for the mastectomy when given a choice (I was borderline for lumpectomy or mastectomy, but as soon as I was told I have Breast cancer I said to my husband I don't want them - either of them, I will have a double mastectomy (they would only do the cancerous one to begin with but they are doing the other after I finish chemo etc - due to my family history etc). I personally didn't want to keep something that was trying to kill me.
I am also having my other one removed after I finish chemo, as I am high risk of it due to family history etc (awaiting genetic testing for BRACA genes) and therfore could get it in the other breast, so I don't want that one either.
I am 41 (40 @ diagnosis - 22/12/11- stage2 ductal cell carcinoma). I had a nipple sparing and partial skin sparing mastectomy with an immediate silicone implant reconstruction (didn't know at the time if I was having the any of the skin or nipple spared, but my surgeon decided to keep what he could because they were clear) (the skin near my tumour was removed becasue the tumour was puckering the skin so it was probably close to the skin (I was happy tfor them to take everything if they had to as long as they would start the process for reconstruction. I was supposed to have a skin/tissue expander put in but when my surgeon did the surgery he said things were good enough for the implant to go staight in saving me another surgery in the future.
It ireally is up to you if you want to go for the lumpectomy first or the mastectomy, as you are the one who has to live with the decision (breast, no breast, chace of regowth and everything).
Reconstructions can and do look really good these days - if I didn't show my scars you would have NO idea that I had, had a reconstrcution done, and my scars will fade overtime making them a lot less obvious than they are (I only had the surgery on 03/02/12, so they are very new, but they will fade and even if they didn't I don't care - scars are the least bother to me - getting the tumour out and reducing my risk of it coming back was my first (and only) choice really, anything more was a bonus.
You are right it is totally different when you talk about it hyperthetically, and then have to deal with it for real.
You are being very strong - the initial diagnosis is the hardest, because they tell you , you have cancer and then they throw everything at you so quickly - surgery, tests, options and everything and your brain and body are still in shock from hearing the - You have cancer line. Next hardest is the waiting for things - surgery, results etc and then to see if you need more treatment like radiotherapy or chemo.
If you want someone to talk about more about options, the breast care nurses are wonderful - a lot of hospitals have these are they are worth their weight in gold - It depends on where you are in Oz of course, but your hospital may have one (or more) or have acces to one in your area.
You WILL get through this. Take a deep breath and you will be fine.
Good Luck with you upcoming appointments and surgery (do you have a date for surgery yet?)