Throat mucus and burping after meal.

Hello Doctor, I have had early-morning allergic sneezing and runny nose since childhood. For the past few years, I experience post-nasal drip and thick mucus in my throat as soon as I wake up, and I need to cough to clear it. When I take a deep forced exhale, I feel a mild vibration/flutter near my throat/vocal cords. My mucus worsens after lunch/dinner, especially in the evening and at night, along with burping and indigestion. Sometimes I hear a slight wheeze only during long deep exhalation, but I do not have breathlessness at rest. I take Levocetirizine or Montelukast occasionally. Could this be due to post-nasal drip + silent acid reflux (LPR) irritating the throat/airway, or early mild asthma triggered by allergy/reflux? Before I consult in person, can you please suggest a medicine or treatment that I can try at home for 7–10 days to see if symptoms improve? Thank you.