How bad has plan B messed up your cycle?

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I took plan B October 28 and was ovulating at the time... I know now it doesn’t work when you’re ovulating so I’ve just been waiting. I am over 10 days late for my period and I have taken 2 pregnancy tests 10 days apart from each other (day after missed period and 10 days after) and they both were negative. So I was wondering how bad has it messed up anyone’s cycle or their experience with it?