Lately i have been getting phlem in my lungs and throat after eating and it becomes hard to breathe. i don't smoke so im not sure why this is happening?

Possible LERD: Exposure of the vocal cords to stomach acid & pepsin will result in inflammation of the vocal cords (as is also often seen with acid regurgitation) = lerd. Acute laryngitis may result, but watch out for chronic hoarseness, throat clearing, airway spasms, cough, bronchitis, an asthma-type presentation, & even a higher risk of throat cancer. May however not be reflux so please get yourself checked.

Unusual: There maybe food going into your lungs. This can be life threatening if a piece of meat or steak closes down your airway. Some people have died in restaurants while eating and swallowing large pieces of meat. I do believe that you are not at risk and I do not want you to worry but you want to check with your doc and discuss nasolaryngoscopy or "fees" study. It may or may not be useful for you.