I Woke Up Today Feeling Fine. By Noon/1pm I Started

I woke up today feeling fine. By noon/1pm I started getting slightly dizzy, light headed, diarrhea , sore back, stomach aches, and nauseous. By 3 I threw up twice, by 5 I threw up about half a dozen times.
Other people in my house have been sick for about a week now with slightly similar symptoms (diarrhea and achy, followed by cough and vomit once). I just got back from vacation yesterday so I don't think I caught what they have. Do I perhaps have food poisoning?