First of all never take medicines on your own. Our bodies develop resistance to anti biotic, etc.
Don't blow your nose too hard as that worsens the sinus and headache.
Make sure your room is clean and free from dust and mites, as i sense an allergy, something like Asthma
Avoid exposure to cold, cold air.
Drink plenty of water, at least 8 glasses a day, warm, especially when the winters are at the corner.
Take vitamin C. 500 to 1500 mg per day, including Zinc in safe recommended dose.
Grind some ginger and pour boiling water over it and drink that, or add some leaves of tea and honey as well. Honey is very good.
And for cold boil some cinnamon barks and serve with honey. And for cough add some licorice roots and poppy seeds as well.
Try inhaling steam as it helps with congestion.
Try this recipe for the cough
Grind the following herbs, each half a teaspoon and mix with three ounces molasses and then use one teaspoon in a cup of hot tea,:
Skunk Cabbage, Horehound, Ceyenne Pepper, Bayberry bark and powdered Valerian root.
Keep me informed of how you are doing and I hope this helps, for I may suggest a few more recipes as per your condition.