Sick with important test tomorrow

So sometimes my period makes me extremely sick. Aside from the awful cramps I experience symptoms similar to a stomach virus. I am scheduled to take my ACT Tomorrow but I honestly don't know if I can make it. I've already taken the SAT so I asked my mom if I could reschedule but she said as long as I'm not missing a limb I'll be fine and I can do anything with my mind and make the symptoms magically disappear🙄. So I was wondering if there was anything I could do to help stop these symptoms? Pepto Bismal doesn't really help me.