Yes, I also have had this problem after a bout with bronchitis in 2000. The cough occurs at any time but I've noticed in the morning I collect a lot of mucus in my sinuses and stomach. Once I eat or drink anything with acid - lemonaid, I'll vomit. Water provides relief. While in Mexico, I asked a doctor about this cough. He prescribed a narcotic sypup. I found relief, but it was addictive because I searched frantically for it in the US, but could'nt replace it. The cough returned. My lungs have been x-rayed and are clear but they did find a swallowing disorder which apparently may be corrected with surgery. Has any been diagnosed with a swallowing disorder related to the cough? I also moisturize my nostrils in the evening with a saline gel, keep cough drops nearby and drink water. This helps me through the night. Also soaking in a warm bath, and steam also seem to provide some relief. Fenugreek and Fenuthyme natural supplements, and a salt water gargle seems to dry up the mucous .