We had a child, then tried again 5 years later. That pregnancy ended in miscarriage at 17 weeks. An endocrinologist told me I'd never carry again to full term and tried to convince me to get esure implanted to prevent another miscarriage. I trusted God and knew in my heart that we would eventually one day at some point unknown to me, have another child. Now when our first child was 9, I went to a chiropractor for super lower back pain. The chiro said chiropractic helps for lots of things, even infertility. Just so happens 4 months into treatment I conceived a boy! I was 40 years old. He was/is healthy, now 7 yrs. When he was 11 months old I gave birth to another boy, when I was 41. He was a preemie but is now a healthy 6 yr old.
Never in the 10 year between the first and second child did I ever let the faulty advice of a human and the godless unfaithfulness of a doctor get in the way of my hope. He's a pretty good doctor but a doctor believing in science nonetheless, more than God. You've got to stop trying so hard. You've got to stop following the calendar. It's only causing you great distress, and that's going to further dampen your efforts to conceive anyway. You've got to stop thinking about it and enjoy life, just let it happen. If it doesn't happen, you can give yourself 5 years and adopt. I've even heard of people giving up and adopting, and then getting pregnant. Neither you nor your wife control pregnancy. Obviously you need to make love for it to happen, but whether you conceive or not is completely and fully in God's hands. So be happy, accept your fate with the hopes (and prayers?) that God will bless you with children, and be grateful for the wife and the life you already have.