Is an LH Spike before Period while on the pill possible?

I'm on the pill, but I did miss a few earlier in October maybe 2.5 weeks ago. I had light spotting 4 days ago which isn't typical for me at all. My period should have started today. Negative on the pregnancy test but positive or close to positive on an LH test. I know LH can surge before a period but i didn't think it did on the pill? I havent missed any more pills in the last few weeks.

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