I keep coughing up film bad?

Depends on so much: It is most likely just an allergy or virus, or something of that nature. However, if it is so bad it is affecting your breathing, causing issues while sleeping, or anything else, then you should check with your physician just to be safe. Wish i could provide more help, but that's about all i can recommend with a limited history.

COUGH MED/CHECK UP: You have a bad cough.You have two choices 1treat t home with increased fluids, over the counter cough medicine with/without pectorant, humidifier etc. 2if cough is too bad and associated with other symptoms like fever, headache, body ache, nausea;vomiting, wheezing and short of breath etc, than you consult your doctor get checked if you smoke stop smoking.