PLEASE HELP ASAP!! CRAMPING!?

I have been cramping for 4 hrs non-stop. The pain on a scale of one to 10 is a 5. The thing that is bothering me the most is they wont go away not even for a second. I feel nauseous and completely worn out.. All i want to do is sleep, but cant. Ibuprofen wont help. I have tried to take melatonin to help me go to sleep. Hot tea is not working either. Please someone tell me how to make this go away, or what it is, something I don't know how much longer i can take it.