At 7 months, you should never give over-the-counter cough and cold medicines, as they can cause serious side effects in babies. Since his symptoms are frequent and persistent, please return to your pediatrician or seek a second opinion. He needs a professional evaluation to rule out allergies, environmental irritants, or asthma-like conditions. For safe home relief, use saline nasal drops and a bulb syringe to clear his nose, run a cool-mist humidifier in his room, and keep him well-hydrated with breast milk or formula. Do not start any new medications without a doctor's direct prescription.

Your child's symptoms, especially the severe ear pain causing crying at night, strongly suggest an ear infection (otitis media) complicating a cold. Please consult a pediatrician promptly for an physical ear examination. For immediate relief, you can give pediatric paracetamol (acetaminophen) or ibuprofen, dosing strictly according to their weight, to ease the pain. Use saline nasal drops to help clear the blocked nose and a cool-mist humidifier for chest congestion. Avoid giving over-the-counter cough and cold syrups to young children without a doctor's prescription. If a bacterial ear infection is diagnosed, the pediatrician may prescribe antibiotics.