Oh, you poor thing. I hope you start feeling better soon. I'm lucky enough to have not gotten a cold since I started this WOE (yippee!) but I do know that most drugstores have a good section of sugar free medicines and cough drops for diabetics. Not sure of a specific brand to recommend, but if you ask the prescription counter, they should be able to point you in the right direction.

Good luck. Drink some hot tea and lots of water. Feel better.