Feeling light-headed while coughing.

I've had a cold and a cough for the past week, and the cough seems to be getting worse and when I cough, like even a small one, I get light-headed. Is this normal for just a viral infection?
Any way to get it to stop, or should I just get used to it till it goes away? It also happens when I blow my nose too, and I get exhausted easily during the day because of it.