Hey Brenda!
I just wanted to add that you might want to try to do more than one each day, especially when the line is getting close to positive. I know I would have totally missed my true positive this month if I had only taken 1 per day!
I also don't know if you have bought the OPKs online, but they are waaayyy cheaper than buying them at the store. That way, you don't fee so bad using more than 1 per day
Hope that helps!