Coughing up white phlegm?

Could possibly be an infection. If it's accompanied by chest pain, its probably pneumonia. If not, could be a really adverse reaction to pollen in the air, especially if you live around thick shrubbery. if latter being the case, get yourself an air purifier. if it's the first choice, go to the nearest hospital ER. The ER has to take you regardless of your financial status and they can just bill you later.