I didn't know where exactly to post this; I apologize if it's in the wrong place.

So when I'm on my period I sometimes get these EXCRUCIATING cramps, like to the point where I can't stand up or walk. Now lately, every other month either the day before I'm due to ovulate or on the day of I get these same pains. It's at the point where I might have to miss classes if these pains continue on to tomorrow. Is it normal to feel pain when you're ovulating? Should I go see someone?