Constant clearing of your throat:
Look up Eosinophilic Esophagitis (EoE). The best info is honestly on reddit. I had some symptoms described by others (along with difficulty swallowing). I now have to avoid gluten, dairy, tomatoes, and russet potatoes. Pizza destroys me. Even though it is NOT due to GERD, proton pump inhibitors can help (from what I can tell research has not solved why they help).
Two other things that has helped me are make sure to focus on breathing with belly and salt/electrolyte intake.
edit: to be clear, I was diagnosed via endoscopy