Hello. For the last two weeks i've had a cough but it only occurs at night. Right before I fall asleep, I start coughing a lot, with the overwhelming feeling of something tickeling my throat, and my eyes start watering so much its as if im crying, and my nose starts to run, and I cough up very little amounts of mucus. During the day however, I feel completly fine, with no symptoms, but it will happen once throughout the day as well. Sitting up while sleeping helps a lot, and i've tried taking Mucinex to break up and phlegm, but doesn't seem to work. Almost positive its not an allergy. Please help!