CathyA,
is it possible you have some acid reflux too? when you mentioned the coughing spells 1-2 hours after eating it makes me think something's not right with that area. Ask me how I know ...
I just finished my 3rd cold this year, but fortunately no fever. I used Robitussin Severe cough and Sore throat, and that worked well for me especially in being able to sleep at night.
You have my sympathies!