HELP FOR THE NEWBIES

The whole idea of ttc makes me super nervous because I feel like no matter how much research I do, things get over whelming. I have so many questions.

-What are opks? How do they work?

-When do you normally ovulate?

-When is the best time to BD? Before, during or after your ovulating?

-What is the best way to get pregnant the fastest with least amount of stress?

-How accurate is Glow's prediction for ovulation day?

Now that I am actually typing out all of my questions, I forget the rest. How would you explain the whole concept of ttc to beginners? Anything that helped you? Anything that made it harder?