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Hello, this is Dr. David. I am reviewing your question now and will be with you momentarily.
I am sorry your father has cancer
how old are you?
bad sinus infection and bad allergies can cause post nasal drip and you coughing and spitting up a lot of mucus
you may need a course of antibiotics to help treat a sinus bacterial infection
and you may need to take daily allergy medications like Allegra 180mg and use steroid nasal sprays like Nasocort or Rhinocort to help keep allergy runny nose away.
where in your abdomen are you sore? below your left lower ribs? that is where your stomach is and is often from excessive stomach acid. stomach acid reducing medications like maalox, mylanta, zantac, prilosec could help decrease stomach acid