No AF 15 dpo and ovulating again?

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Can anyone shed some light on what might be happening in my body.

AF was due on 7/21 and didn’t make an appearance. I’ve taken several hcg tests and they have all been negative. I took an lh surge test today and my lh is high enough to read positive. I already had a positive test on 7/6. Is it possible to ovulate twice? Is this normal for people with PCOS? I’m grasping at straws here