Help..when exactly did I O? Cd 39 no AF and Bfn πŸ˜”πŸ’”

Rosey β€’ Married 20 years. We have 4 beautiful babies 18, 15,11 and our babyboy blessing after 2 yrs TTC β€οΈπŸ’™β€οΈπŸ’™ God is Good!