At lest once a day I get a tickle in my throat that leads to coughing to the point where I throw up. Sometimes I can "catch" the coughing with a hard candy to "lubricate" my throat and get the coughing under control. This has been happening for about 3 weeks. Usually at night when I'm lying in bed watching tv before falling asleep. But several times the coughing has woken me up from sleeping. Suggestions?