Patricia1, Is it the cold of the icecream malt or is some of it going down the wrong way that is causing your congestion? I have a smoothie every morning and I always cough a bit while I'm drinking it because of the difficulty I have with liquids (even though the smoothie is fairly thick). Its a bit messy but it doesn't last long.
Try having someone beat a little on your chest to clear up the congestion. Kind of like Tarzan. That might clear it up. Not too hard, but if you do it "Tarzan style," it feels good and breaks up congestion.