Initially it started with the usual cough due to an infection. Was given antibiotics. Cough lessen but ongoing. 3 months into this, I kept coughing at night and coughed up white, frothy sputum, with occasional pink tinge. I sometimes would have to cough until I gagged. I would threw up as well (the same white frothy sputum + and some sour greenish liquid). I would also be wheezing when this happens. Should I go to the emergency or GP to manage is fine?