Has anyone ever gotten a bfp bd once in fertile week

Kelsey • Mommy to a beautiful 5 year old little girl and handsome 3 year old little boy. Another sweet Baby boy coming in May!
I know it's not likely, but my hubby was out of town a lot this month. So we only had sex one time during fertile week. We did use pre seed though. Just curious if anyone has ever gotten a bfp after this?