When should I start taking ovulation tests? 👶🏻

Jennifer • 23. Texas. Happily married. TTC #1. 💜
Hello ladies! 
When should I start taking tests to track my ovulation? My normal cycle has been between 28 and 30 days. I am on my last day of AF with a very minimal spotting. Should I start tomorrow? I just don't want to miss my fertile window!