What opk do you use?

Rachel

I had a doctors appointment today and my doctor wants me to "seriously" try using opk before she runs any tests or prescribes me anything to help me get pregnant. I have used the walmart brand with the 2 lines and hate them honestly. She recommended clear blue but they seem expensive. I mean anything is worth having another baby. Just looking at all my options here. Drop your recommendations. Thank you 🖤