If you had food poisoning, you wouldn't feel a little nauseous of have a little diarreah, you would feel extremely nauseous (where even moving from lying down make you feel sick). More likely the sheer amount of dairy, milk, coffee, eggs, butter which all contain lots of lactulose, which is a stool softner and will cause small amounts of diarreah. You will be absolutely fine, also you took a Zantac which will help. Also drink lots of water, as dehydration can cause acid heartburn.