I don't have much to add that Nefertity didn't already say but I would like to encourage you not to give up. NBE results are real, they just take time. I don't think I had any visible progress in my first year of NBE. I'm in my 3rd and finally seeing the visible growth, I think it was this year alone that I grew 2 cup sizes.
Also, keep trying different methods. Every person will react to something different.
I know the feeling of feeling hopeless and defeated, even though I HAVE seen personal growth this year... when I compare myself to busty women I feel so bad about myself. Especially knowing I'm working so hard just to have these unimpressive breasts. Sometimes I want to take the easy way out and get implants. But I know that having my own natural breasts grow will be more satisfying (and less health risks/complications) so I don't want to give up!