(OPK) I’m new to this. Please help?

Jax

My husband and I are tracking my ovulation before we start working with our donor. My cycle is averaging 34 days and I’m at CD28. I know 2 lines don’t always mean positive. I know the 1st line has to be darker than the 2nd. But why is it light if I’m close to starting my period again? I’m supposed to start in 5 days. I haven’t tracked before and was going to make next month my first month tracking. Is it even possible to ovulate right before your period?