Plan b and 6 days late

I took plan be around the 23rd of January. 2 days after my period ended. My period is now 6 days late. He didn’t cum in me but we went rounds and I was just nervous so I took one. I took a pregnancy test yesterday and it was negative. But I took 6 or 7 days before ovulation and doesn’t it delay it?? Do y’all think it’s plan b messing with my cycle or should I test again In a few days??