Hello,
Thanks for the query to H.C.M. Forum.
Mucus in throat and nose ,gagging from throat, throat pain.
These symptoms are due to
allergy.
Pain in stomach with pain in
esophagus with excessive bumping are due to hyper acidity.
Drugs for allergy usually develops
gastritis.
So one disorder aggravate others.
As you mentioned that blood and urine tests are normal.
Usually nothing is found abnormal in these two disorders.
Consult a physician and get in complete examination as gastroscopy for ulcer or gastritis in stomach ( esophagus).
Physical examination will find out symptoms of allergy &
sinusitis.
Hops I have answered your query.
If further any question I will help.
Good luck.
Dr. HET