High fever with shivering, dry cough, and body pain for 2 days is most commonly due to a viral infection (like flu), but in some cases it could be illnesses like Dengue or other infections. You should take rest and drink plenty of fluids. Monitor your temperature and symptoms closely. If the fever is high, lasts more than 3 days, or worsens, consult a doctor for proper treatment.

A severe cough with a runny nose is most commonly caused by a viral infection like the common cold, but it can also be due to allergies, sinus infection, or throat irritation. If there is no fever, an allergy is more likely; if you have a fever or body aches, it may be a viral illness. You can try rest, warm fluids, steam inhalation, and simple medications like antihistamines or cough syrup for relief.