that is what worked for us too. We tried for about 2 years and the whole time I swore up and down that I knew my cycle and that I knew when I could get pregnant. Finally, one day I was so sad when I got my period that I marched right out to Target and bought the ovulation sticks. Turns out, no. I did not know my cycle. I was off by nearly 6 days!?!?!?! I used the ovulation sticks and two months later I was pregnant. I hope your situation can be resolved this easily. If it doesn't, definitely talk to your doctor. Keep us posted and the best of luck to you.