Acid Reflux & mild breathing difficulty.

Hello Doctor, I am suffering from acid reflux from last 1 month. I have been taking pan D capsules once daily since last 1 month but i have no improvement.  From last 7 days I am also experiencing mild breathing difficulty due to nasal blockage and i can also feel there is some change in my voice (some kind of vibration in my vocal cord at the time of speaking) & i also have excessive throat clearing with a feeling of mucus stuck in my throat. I am also feeling vomiting tendency whenever i eat too much & i have excessive belching & burping after drinking water and even having a light meal. I am also feeling my stomach is quite full after eating and there is some noise also. I also have a pre-existing asthma but my breathing issue is not originating from chest....i think its related to nose & throat as my breathing issue eases with throat clearing and steam inhalation. Please help me. i am totally irritated due to my excessive throat clearing & acidity.