How long after a missed period should you contact your ob/gyn if you are trying to conceive and all hpt's are coming up negative?

Conceving: If you've been trying for 4-6 months and confirmed ovulation each month, i would see your doctor to find out if there are other issues inhibiting the process. Although you may not need any active treatment for a while, it's better to know than to wait for the next year then find out there is something you can do now to increase your chance of conceiving.