Shettles Method?!

Has anyone tried the Shettles Method? We have one boy, who will be 3 next month, but I wasn't exactly TTC back then. Anyways, we had sex on the 18, 19, 21, 22, and 23 & 25th this month. I ovulated on the 27th. Do you think ill concieve? I'm a healthy 24 yr old, if that helps.