Hello Piazza - I do not have advice but I can share my experience. 4 years ago I was diagnosed with breast cancer and had a bilateral mastectomy, plus chemo, radiotherapy, the lot. I am now completely flat-chested! It took so long to come to terms with it. I avoided mirrors, I wore falsies, I cried lots. With short hair regrowing and a skinny chest I looked like a very peculiar 11-year old boy. I started wearing baggy hoodies to cover up.
Every time I had a check up the doctors would ask if I wanted breast reconstruction. But I always refused because I could not face more surgery - I so needed to get back to life.
And here I would say to you - think very carefully about an operation because it is not just short-term skin-deep healing, it can affect nerves around the chest and arm, sensitivity, movement in your shoulder, scarring, seromas... if your nipple is re-positioned you will likely lose all sensitivity there, a huge loss to physical pleasure. Do not take this lightly, please.
Anyway, then I started running as a way to regain a little fitness and get back some confidence in my body. Like lots of new runners I absolutely loved the freedom and the sensation of increasing strength and energy. I started to like my body again, I did a Race for Life, massive sense of achievement. I wore tight t-shirts and if anyone stared at my chest (and there were plenty) I would think to myself - I survived cancer and now I can run a half-marathon - top that!!! I started to see the scars as a mark of survival and strength.
Well 4 years down the line I have lost a bit of that marvellous energy of emerging from a dark place; have put on weight (not so good); hormonal changes; other life events etc. On the other hand I have gradually found a way of presenting myself that neither hides the fact that I am flat-chested nor is in-your-face... short yet softer hair, blouses and dresses that are not too tight and have a bit of movement in them, layering, interesting scarves, given up the falsies even for work. I mean why wear a bra when you don't have to?!
Sadly sex has been totally off the agenda due to - well, lots of things - but physically the issues are low libido from ongoing medication, and my breasts used to give me a lot of pleasure which is now sadly gone and I don't really know how to replace it.
So Piazza, I do not mean to derail your thread. You are struggling with your body image and I am totally sympathetic to that. Would you consider some kind of exercise or toning up - not focused on your breast size - which might make you feel more confident in your physicality, give you energy and a sense of achievement? Actually (before) when I lost weight it would always show first in my breast size so that might be something to try. Maybe take a friend shopping and try on some different styles of tops? Do try other things before going for an operation. Good luck with your discussion with the doctors.