I had that cold. It was nasty. Was only sick for a few days but the sinuses and cough lasted a full month. I still have some leftover cough.
“I still have some leftover cough.”
two possibilities:
1. Persistent inflammatory irritation of the lungs induced by the original infection. Treatment is steroid and Beta2-adrenergic agonist inhalers or nebulizers. Example steroid is Aerospan and example Beta2-adrenergic agonist is albuterol/levalbuterol.
2. You developed a bacterial co-infection which is quite common. Treatment is with antibiotics.