Hi! I can't help but always read these threads because they echo my own feelings a lot of the time since I've been having a really hard time with NBE. Especially when i saw that you also come from a busty line of women but missed out on that genetic combo (all the women in my family are like j+ cups)
it looks like we've tried a lot of the same things with the same little to no results but please don't give up! you will be so happy once you find what works for you, have you done a hormone test? I just got one done and although it's a little overwhelming and hard to understand as a layperson, it is useful to have to show either professionals or if you're lucky catch someone here that can understand them.
anyway i just want to encourage you to continue your journey! Whenever you want to give up just come on here and write your frustrations out, either on this thread or you can always DM me too - i totally get the feeling of wanting to give up as a lot of people on this site do as well. I have had no NBE results myself but I am here for you to celebrate your wins when you do find what works and pick you up when you're feeling down! All i can recommend is to keep at it and I look forward to your success!