Sorry to barge in but I thought I'd let you know my feelings on it.
I stopped the pill and swore blind never to track anything, or use any aids. I also didnt want sex to become robotic/predictable/purely for baby making.
After a while I wound myself up wondering why the heck i wasn't getting anywhere and starting tracking my temps first. but getting no-where with that, so i then started using the OPKs, and then finally Preseed, which I think me and a few others can honestly say we think it was that that got us our beans!
I think if you can keep to being calm, and letting nature taking its course, and let 'what happens happen' , then you dont even need to look into charting etc. It can wear you down sometimes!