What I reccomend, is when your old enough to move out, eat 1-2 cups of veggies for dinner & get a fan in ur Room & have it blow over ur body. It makes it easier to breath, while your lungs try to heal.

Now that I know ur with a smoker, I highly doubt you have a cold. We call it a smokers cough or smokers cold, cause ur sick all year round, due tot he poisons in your lungs... If you can, open ur window all year round. It helps fresh air to get into ur lungs while sleeping & it helps the healing process.