Look, a week of suffering is expected. But there are red flags. If your fever comes back with a vengeance after it broke? Call a doctor.
If you can’t breathe, or if your chest feels like an elephant is napping on it? That’s an ER visit. Don’t mess around with pneumonia. It’s not a flu sequel you want to star in.
If you’re dizzy, confused, or can’t keep water down? Same deal. Go get help. The flu is a pain, but it shouldn’t actually try to kill you.