I just want to know if I’m not alone

I took a plan b on Sunday July 25th. We did use a condom but we notice a leak so i decided to get a plan B. Wednesday July 28 i started having pain under my stomach. It felt like cramps. It not dying pain. Sometime I have butt cramps too.

Has this happen to anyone else? Is this normal? & yes i read the pamphlet several times.