Burning sensation when swallow ONLY certain foods

For as long as I can remember, it burns my THROAT when I swallow certain foods. Only the, what I consider, very acidic foods will upset my STOMACH as well. However, the upset stomach is a newer symptom. Here are the kinds of foods that burn my throat: Hershey's kisses, poptarts, some pancakes, almost any processed breakfast bar, oranges (the worst), grapes, cherries...well that's all I can remember at the moment.
I used to think it was a reaction to corn syrup or acid, but some items with corn syrup don't bother me. Usually only the fruit hurts my stomach.
Any ideas as to why, would be very helpful.

[Paxiled]

Fruit is very acidic.  You might be experiencing some reflux, meaning that your digestive tract isn't working as it should.  For symptomatic relief, you might try some aloe juice every day and see if it helps any, but you need to find out what's going on with your digestion.  Digestive enzymes might be of help as well.  Oranges are a bit of a giveaway, since they're highly acidic.  The other things also contain milk, and that's a very common substance humans mistake for food.  It's very hard for most people to digest, and it gets worse the longer dairy is eaten in those people.  It might be catching up to you.  A nutritionist would probably try an elimination diet with you, reducing you to a few foods and adding others in slowly to see how you react, but of course it's up to you how you want to proceed.  Good luck.