I developed cold which started suddenly. This was followed by catarrh, running nose which was initially clear and thin but later became thick (sometimes yellowish, sometimes brownish), sore throat, sometimes headache but not always, slight fever sometimes and cough with mucus (which is thick and dirty sometimes with some tiny thread like blood). I took pro-cold and septrin and after about 5 days of continuously using this drug, some of these symptons disappeared. But i still feel very tired, i still have some running nose, i still have cough occassionally. What do you think. Thanks.