What Could Constant Cough And Headache Suggest?

hi, im 21 years old, female, and i cant stop caughing and im not sick (i think)... most of the time i wake up like if i am sick but when im fully awake its like it goes away completly... and the times i wake up not feeling sick the caugh is still there and the caugh is dry...and i also have this head ache that wont go away..... what could be wrong with me???
-thanx :)