Possible food poisoning, what can I take?

Last night my husband and I went to dinner at an Italian restaurant and I ordered shrimp scampi. This morning I had scrambled eggs and fresh fruit for brunch and for dinner a salad and chicken. Not too long after I started having stomach pain. I've had to run to the toilet about 4 times in the last hour. No vomiting, just diarrhea. What can I take?