How do you get rid of really bad cramps from having a period?

Ok, so I'm on my period and I'm having really bad shooting pain in like my gut area and I have a heating pad on right now but nothing seems to be working, and all my friends say that get cramps too but never as bad as what I'm going through right now. And I know some people say walking around helps relieve the cramps but it hurts to stand up and walk around. I need help, should I go to the doctors about this?