I Have Post Nasal Drip And The Mucus Gets Extremely

I have post nasal drip and the mucus gets extremely thick and when it attaches to the back of my throat, It's difficult to dislodge it. I usually results in me coughing, sometimes to the point of vomiting. I've noticed it more so in the morning upon awakening and after consuming my protein shake. I also noticed it when I consume my energy drink prior to working out.