LH surge possible on the pill???

I only started taking birth control this past Thursday. Got on it because of irregular periods due to PCOS. I felt a twinge type “pain” in one of my ovaries so I took a LH test (I know these aren’t always reliable for women with PCOS but it was accurate when I naturally ovulated back in February).

Since I’m on the pill, shouldn’t it be a clear negative on the LH strip? Not sure what to make of this...