First, let me tell you I was born with bronchial Asthma. I´ve had a chronic cough now for at least a month. I went to my PCP and she told me it was my allergies. A few days later I was having trouble breathing and she to me to go to the ER and have chest exrays done. So I did and they gave me a breathing treatment with meds, saline drip and oxygen. They wanted me to stay for observation but I have three dogs and three cats to feed at 4:00 in the afternoon. No options, after my oxygen level was good and my blood pressure was in a normal range I was good to go home. I was told to continue with the nebulizer at home . I was doing it every 3 to 4 hours. Didn´t work. Been suffering with this cough too long. This morning I was resting on the couch and I started coughing again. (10:30) am. I coughed up a square of white phlegm with about 2 tiny clumps of thick white phlegm on it also. Just a little concerned as this has never happened before. Can you tell me what this might be?