I have stomach ache my tummy was loose this morning and i vomitted quite a lot yesterday. my period hasnt come yet, could i be pregnant?

Pregnant or not...: A simple tummy ache with symptoms like nausea, vomiting, or diarrhea, whether at home or traveling, may be from a virus infection, bacteria infection, or contaminated food. A typical normal person, not on medications, usually recovers easily. Taking a Pedialyte popsicle or 2-3 oz of Pedialyte hourly for 1 day, while consuming little else, may settle things down. Otherwise, doctor should evaluate.