3 days ago I was riding my bike for 20 minutes, when I came back to my house, I started do cough really hard, now i have cough, some fever, pain on my back, stomach and throat. Everytime I cough my throat and stomach hurt a lot, I am trying to eat since I woke up but I can t, I feel like if I am rejecting the food. What do I have and how can I feel better?