ive had a cold now for over 3 weeks, my chest is getting a heavier feeling every day, im coughing up yellow sometimes greenish greyish mucus none stop, at times feel like i cant catch my breathe, but the last few days ive been noticing im getting times im feeling light headed,also when i cough i get a sharp pain in 1 spot of my head near the back and also my chest, ive been taking the blue puffer and purple puffer , nothing getting better, is this a hospital issue or a trip back to the doctor please help