Start your opks on cycle day 9. Test twice a day at 2pm and 10pm. You are most likely to ovulate in the afternoon.
Why? (To the bolded)
BD (have intercourse) the last day of your period then from cycle day 9 on and BD every other day until you get the positive opk. Once you get the positive opk, BD every day, in the morning if possible because you will have a head start on catching the egg. Once the opk turns negative, BD two more days after that for assurance.
Do you have a crystal ball?
Make sure you and your DH take plenty if vitamins, it is especially important for DH to take a multi vitamin, zinc, vitamin e, b12, and selenium. Make these changes and it won't take you that long to get PG, and you will have a healthier pregnancy.