My husband and I (late 20's) are approaching our 2 year mark. We've been together for almost 10. We've been completely unprotected for a year. We're not trying.... but we're definitely aren't doing anything to avoid it, nor do we want to. We're mostly active when my calendar is in the green. It seems like every time we have sex in the green my cycle comes early, I change it on my calendar, and it changes the OVU dates. Its VERY disappointingly!!! Am I going about this all wrong? Should I use a different method?