I'm A 24 Year Old Male. I Had A Mild

I'm a 24 year old male. I had a mild fever for two days last week but felt fine towards the second night. Since then I haven't been able to eat or drink without getting nauseous a few bites in. Over the last 5 days I've dropped 15lbs (went from 215 to 200 at 6ft tall) and I don't know what to do.