When should I start taking OPKs?

Taylor • 29 | Wife💍 | Mama 👧🏼 | Dog Mama 🐶🐶 | IVF Warrior | Baby Due October 2023 🤰🏼

I have seen the chart. Last cycle was my first cycle trying OPKs. I got a positive on CD 14 and my cycle ended up being 27 days. I normally have longer cycles like 33 or more. When should I start doing them this cycle? I am currently on CD 11 so I am wondering if I should start today. What do you all think?