​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Ladiessss!! Really need YOUR help! This is my first time using OPK test strips. Period ended 2 days ago. When to BD ?