For your symptoms, over-the-counter (OTC) medications can provide relief. For the headache, you can take Paracetamol (Acetaminophen) or Ibuprofen. For the severe runny nose, an antihistamine like Cetirizine or Loratadine, or a short-term decongestant nasal spray can help. For the cough, try a syrup containing Dextromethorphan (for dry cough) or Guaifenesin (for wet cough). Rest, stay well-hydrated with warm fluids, and try steam inhalation. Since your symptoms started just two days ago, it is likely a viral cold. However, if you develop a high fever, difficulty breathing, or if symptoms persist beyond 10 days, please consult a doctor in person.