Stopping opk's

After 7 months of trying I've decided this cycle to stop opk's... I have decided to try listening to my body, and seeing how that works for a few cycles. I know with my daughter she was conceived exactly on the 14th day of my cycle. I know the exact date because it was the only time that month my hubby and I had sex... So I think I'll just make sure we do the deed the 11th through 16th day of my cycle and hope for the best. I just feel like this is becoming a job, and I'm tired of worrying about it each month and then getting disappointed at the end of each cycle. Did any one try this approach before? How long did it take to conceive? Was it less stressful?