Already ovulated?

I took an opk today because app says im due to ovulate tomorrow, and the opks had only just arrived this morning. It was seriously negative. On Monday i notice ALOT of ewcm snd ovulation cramps, since then the ewcm has gone very light so what do you guys reckon? I have regular 27 day cycles and that would've been cycle day 10.. So early for me as i normally ovulate cycle day 13, which is tomorrow but negative test today. Not sure what's going on...

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