Yo, I'm 16 years old and I have a constant recurring problem about spitting up phlegm. Whenever I eat or drink (including water), I am almost instantly hit with a slight dry cough and mass amounts of phlegm that I am forced to spit out. I rarely go to the bathroom, only to pee. I do eat quite a bit of fast food and sugars.I have trouble sleeping at night and have found that they only way to do so was by spitting it all up. These problems began happening this month.