I took plan b late on the third day

So I took a plan b on the 3rd day after sex and I probably took it right at or around the 72hour mark...do you think it’ll work because two days after taking it and still currently now I get cramps and I got hot flashes a lot yesterday and my period isn’t due to c’mon till around the 23rd and my body just feels off idk how to explain it but it’s like I just need to keep rubbing my stomach to soothe the light cramping every