IS THIS A POSITIVE OPK ?????????????

Letisha
So I'm doing a <a href="https://glowing.com/glow-fertility-program">IUI</a> and I took this like 30 minutes ago. But as soon as it staring appearing it was dark compared to yesterday and the days before. And it is also my first time using these OPKs and I'm ttc baby #4. And I've been cramping since I woke up which is also a sign of ovulation!!  So should I BD (well in my case <a href="https://glowing.com/glow-fertility-program">IUI</a>) today???? Test line is darker then surge line.. so what do y'all think ??