Salad Kit Causes Illness - Walmart, Las Vegas Nevada

Las Vegas, Nevada, United States

I ate some of the salad for dinner from an unopened salad kit. It was still good for several more days according to the best by/exp date. Around 10:30/11pm I started feeling bad cramps and gas pains. About an hour later I started having the urge to go to the bathroom. It's now 1:30 am and I am still having this issue along with nausea. | Symptoms: Diarrhea, Nausea, Cramps, Gas