Hi it is always a tough time to make decisions, especially when we feel so vunerable.I'm sure you have thought long and hard about your decision, you wouldn't be normal if you didn't have doubts. Only you yourself can decide what you want ,it is your body. I had to a mastectomy with immediate reconstruction this was the right choice, for me but maybe not for others and beleive me I had many doubts about my decsion.
Go with what you feel is right for you, good luck it is another bit of your trip. (sorry I can't call it a journey it has always been a sh.... trip for me). Sending you positive vibes and hugsxxx