Pre-Period Cramps

I’m supposed to start my period soon, like within the next two or three days soon, and I’m already having the worst stomach pain. It’s like period cramps, but I haven’t started my period yet. Is this normal or could it be something else? And does anyone know of a way to make it stop or a way to make it hurt less? I’ve never had pre-period cramps before. I’m kind of worried it might be something else because of that, and also because about two weeks ago, my boyfriend said he wasn’t sure if he pulled out in time and I just figured he was freaking out over nothing so we didn’t go get Plan B or anything. 😭