Is this possible ...

Brittany • Christian Mother , & wife ,baby number two Due march 27th??
Is it possible to have a positive opk & a period but not be ovulating ?? I was just looking on baby center and saw a post about that . It got me to thinking because I'm BFing , I started using opks last month had a positive and then 16 days later AF showed . Is it possible to not ovulate but still have a period ??