ive had a really bad cough for almost 4 weeks. for the past week i thought it was getting better, but its getting worse apparently. every now and then when i cough, i cant stop coughing and i end up gagging like im about to throw up. i dont know whats wrong and dont know what i could have. if it helps any, half the time when i cough i cough up phlegm. i also have a sore throat that comes and goes during the day. i really dont want to see a doctor unless its pretty serious, because its only really bad in the morning and almost goes away during the day and then comes back at night. anyone have the slightest clue what i have?