If your menstrual cycle has changed to 39 days, you may not be ovulating regularly.
This may make it more challenging to conceive. You should see your gynecologist and he may want to regulate your cycles and or start you on Clomid (clomiphene) to help to regulate your cycles. Finally, make sure you are on a prenatal vitamin with folic acid. Good luck.
Would you like to video or text chat with me?