I am having explosive like diarrhea with lots of gas, and cramps. i ate mexican rice and shrimp. i don't know if it is related. i need this to go away?

High probability it's related: You may be experiencing symptoms of acute food poisoning. However, it's important to see if others who ate with you had the same reaction or not. That would establish a causal relationship. However the diarrhea that you're experiencing could easily have come from the bad shrimp, or rice, or both. The biggest cause for concern with diarrhea is water loss. If the cramping, and diarrhea doesn't stop, you may have to go to the er to avoid dehydration.