When to seek help?

I have recently been having cramps that are completely debilitating. I've had cramps before, but the ones I've had this month and last are exponentially worse. They leave me lying on the bathroom floor with diarrhea and vomitting spells that sometimes last for hours. Baths don't work, lying down doesn't work, walking doesn't work, even Advil takes hours to start working! Along with this, my period is significantly heavier. I don't use tampons or my diva cup lately because they make the cramping worse, but I'm going through a pad every hour-2 hours.
This is INSANE. I was actually lying on the bathroom floor several hours ago considering the possibility of being in labor without knowing I was pregnant.
At what point do I seek help? Should I go to the hospital if I'm in this much pain again? Do I just suck is up and pray the Advil kicks in before I start vomiting? 
Please help.