I had to go to the hospital today and get a chest x-ray. I've had this persistent cough for about a month now, and after trying an inhaler over the weekend it still hasn't lessened or gone away. My doctor had recommended the x-rays last week, but said I could try the inhaler medication over the weekend to see if it would help the symptoms. It hasn't, so hopefully the x-rays will reveal if anything major has gone wrong. She said that most likely a virus had just settled in, but since this isn't the first time I've had this problem they want to check and make sure.