Here are the signs of dehydration:
Mild Dehydration: Thirst, dry lips, dry mouth, flushed skin, fatigue, irritability, headache, urine begins to darken in color, urine output decreases
Moderate Dehydration: (call a medical professional): All of the signs of mild dehydration, plus: skin doesn't bounce back quickly when pressed, very dry mouth, sunken eyes, output of urine will be limited and color of urine will be dark yellow, cramps, stiff and/or painful joints, severe irritability, fatigue, severe headache
Severe Dehydration: (call emergency number): All of the signs of mild and moderate dehydration, plus: blue lips, blotchy skin, confusion, lethargy, cold hands and feet, rapid breathing, rapid and weak pulse, low blood pressure, dizziness, fainting, high fever, inability to pee or cry tears, disinterest in drinking fluid.
Keeping fluids down is very important right now. Try drinking in small amounts. Sipping your fluids every 10 minutes or so. If you are unable to keep them down and start experiencing signs of dehydration get to a doctor asap for intravenous fluids.