Need to rethink this

So I'm in my TWW. When I was inseminated, the midwife told me that I test to much and should only take opks in the morning. This cycle I ovulated earlier than usual by about 3 days. The day I got my pos opk, I got a neg in the morning, by 6pm it looked positive and by 10pm it was a def positive. I got my iui the next day around 5pm. I feel like I missed my window. Maybe I should just test in the mornings because testing at night and getting my iui the next day has not been working. I have 6 more days until I test but I already feel like I'm out.

We are doing this unmedicated, but perhaps next month we will look into getting some more help.