Ive been nauseous for about 3 days now along with achy and tired and i have the chills what it wrong with me?

Viral Infection: Your symptoms indicate you may have a viral infection. Viruses are frequently implicated in the symptoms you're describing. Viral gastritis means a virus affecting your stomach, also known as a "stomach flu". If over-the-counter relief isn't achieved in 3 days, it is important to present to a primary care physician (or urgent care physician) for further evaluation!