I have terrible cramping in my lower back and a little In my lower abdomin. But it ive only been spotting all day, and I'm just kinda confused?

Is it period time? If it is time for your period, then this may just be a variant of your cycle. If you are late for your period, or this is not the time for your period in, then take a pregnancy test and make an appointment with your gyn to get checked.