Then you have post viral syndrome which is common with viruses. If you've ever had a common cold or flu you would know. I had a simple cold and had fatigue for months. It just lingered and lingered
Actually some things are easy to diagnose remotely. Which is why remote doctor visits are becoming more common. If you feel like crap and only your throat hurts you most likely have strep. Since bacterias attack only one area. If you feel like crap and your nose is running, head hurts and have a sore throat, you have a virus. Yet doctors still prescribe antibiotics for viruses. No wonder we have a problem.