Flu can be severe: If you're having such severe symptoms, you need to go back and have your oxygen levels checked. Particularly the test that we call an 'ambulatory pulse ox' - they need to walk you and see what your oxygen levels drop to. Based on that, you may need to be hospitalized. I suspect also you've injured one of the small muscles that connects the ribs (from coughing). Flu can be very dangerous. Go to ER
Answered 12/22/2016
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