Another NFP/Ecological Breastfeeding user here. We successfully prevented pregnancy for 5 years before we were ready to conceive our first, and then for 2 years after our son was born, even though my cycle returned at 9 months PP. We didn't exactly plan this pregnancy, but I had gotten really lax about charting. Basically, I was just keeping track of the first day of my period and we weren't using any other form of BC (normally we use condoms or withdrawal during fertile times. I guess that is more FAM than NFP). So we weren't really surprised to find out I was pregnant.
I don't do hormonal BC because I don't believe it's healthy to disrupt a natural process. The copper IUD scares me because I have such a hard time with regular periods, and I don't want to take a chance of making them worse. I'm not comfortable with the risks of the IUD, either. And I'm not willing to do a tubal ligation. If my husband decides that he's willing to have a vasectomy, I'll support his decision, but I would never ask him to do it. If I'm not willing to do it, I wouldn't expect him to. I don't think either of us are ready for a permanent solution anyway.
I like charting because I feel more in tune with my body. I don't see it as a chore or one more thing that I have to do. So, I think we will just stick with that for now.
ETA: Meant to ask... do any of the NFP'ers use Cycle Beads? I was thinking about buying the app for my phone and not the actual beads when my cycle returns.
Sorry, DDC. In case you've not thought of it ... NFP doesn't work well when you are perimenopausal. Ask me how I know.