How long has it been going on, jenkajoe?
If this is just a recent development, your dog may
be coming down with kennel cough. We've had a couple of bouts of it and some of the dogs had onset sort of like what you're describing.
We also get reverse sneezing, though. Someone on the board (though I can't remember who) suggested that raising the dog into a standing position on their high logs with their front legs held up off the ground will stop a reverse sneeze. I tried it on Grace last time she had an episode and it seemed to work.