Can plan b make you skip a period?

I took it like a month ago and was supposed to get my period 2 weeks ago but nothing came. Instead I just got cramps but that was it. Also - couple days after taking it, I did bleed for a couple days so idk if it just came early or what. My periods last 7 days but I bled less than that. I remember reading that it can affect your period but if you miss it, to take a pregnancy test, which I did, and it came negative. I’m planning to take another one if my period doesn’t come by my next “scheduled” period. But yeah, that’s why I’m asking lol

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