Oh boy, there are countless variations of food poisoning, so please just quit the self-diagnosis. In most cases, healthy people can wait out food poisoning just fine, but yeah, you never know. Also keep in mind that whatever you got might be contagious. So by not going to a doctor, you might put other people in danger, even if there is no one directly around you.
Official member of VGC's Nintendo family, approved by the one and only RolStoppable. I feel honored.