I'm going to start trying to SMEP method next month. I've read about people getting good results with that. It's every other starting from CD8. On CD10, you start using OPKs and you keep doing every other day until you get a positive OPK. Once you get the positive, you BD that day, the day after, the next day (3 days in a row), then skip a day, then BD again. It's a lot more BDing after O than I have been doing, maybe that's what's missing. I figure it's worth a shot!