Well, I have to be honest here. After the first two kids we decided to just let God take over and gave up on the charting. A few times over the years we would abstain for one reason or another but I haven't recorded my temperature in years! The other signs were easier for me to read, anyway.
I've never tried the ecological breastfeeding, either. My kids are lucky to have had any at all! LOL!
I'm kind of the same way. I am already to go again after less than two months postpartum. So then I do use charts and temp checks.
My youngest is almost two and I stopped charting last summer. I still would like to wait a bit longer, but it would be fine if baby number three showed up any time now. So I am not taking it as seriously now. It's nice to have that kind of freedom.