As per your description,your symptoms are suggesting of Gastroenteritis.
And you should try some self care remedies until you see your doctor for a clinical exam.
Eat BRATY(Banana,Rice,Apple sauce,Toast & Yogurt) diet.
Try Peptobismol,Citrucel,GAS X and probiotic.
Monitor your blood pressure if you feel dizzy.
And it's good to see your doctor and undergo stool analysis.
Antibiotics,anti-spasmodic medicines with IV fluids can be given in severe diarrhea,dizziness,pain abdomen.
Feel free for further queries. It's good to discuss rather than quit.
Your satisfaction is our goal.