I know everyone's body is different. but i wanted to share how i got pregnant this time and maybe it can shine some light or help others. We tried for 3 months. the first month we BD i think everyday except once in my fertile window. Didn't happen. The second month we decided what the hell we wont try and we won't prevent. It didn't happen. the third month i decided to take opks. i only tested once a day and that was around late afternoon early evening because i knew my husband wouldn't be home till after midnight to BD.

When i finally got my positive, both lines were the same color and so that night we BD. We also used preseed for the first time. the next morning i took another opk to see if it was still positive and my test line was darker than the control line. Well i tested again that evening to see if we should BD again and it was negative.

That was in April and im 9 weeks pregnant today. We only got to BD once and it worked.

So maybe when we think the test line being darker is better than them being the same color.. we are missing the window. I don't know. But it worked for us.