Mastectomy bra and prosthesis issues

Sorry, I don't think I can help but just wanted to sympathise. I too have a large cup, but haven't had this problem. It doesn't sound like you need another fitter, but if you want to try another and you are in Melbourne, I can recommend mine. Surely there must be  another solution other than losing your breast, but I can fully understand the discomfort and the frustration. I had to wear a soft pad, rather than a proper prosthesis, for a year due to a very large and persistent seroma and that nearly drove me batty, because of its tendency to "float" but with no actual discomfort. To be putting up with this so for so long isn't petty at all, shows great fortitude on your part. I always think it's the little things that can surprise us emotionally - we deal with the big ones, but all the frustration comes out over the apparently smaller things! Strength to you.