Chloraseptic symptoms and conditions

Someone, please tell me how long this coughing will last! I took Lisinopril for 4 weeks. During that time I had many of the same symptoms that I'm reading now, but didn't realize what was causing them. But after 3 weeks of a constant dry cough that led to gagging more often than not and cough attacks every hour on the hour even at night, I turned to the Internet to research tickling coughs. I too was sure I had throat cancer after experiencing lung cancer just a year ago. After reading all of these experiences from all of the people on this site, I was relieved yet furious. I called to inform my doctor of the side effect of the coughing that was keeping me from going anywhere but work (I'm a teacher so you can imagine how difficult that is). I was consuming 10 - 15 cough drops a day and night which was not helping my weight issue. She prescribed Toprol which I researched and read that it should not be taken if you have had a history of lung issues. Needless to say, I'm not going to take that either. My blood pressure is pre-hypertension so I believe I can control that myself with exercise and diet. It's been 5 days since I stopped taking the Lisinopril and the coughing has not subsided at all. I was up every hour on the hour last night and that was with taking a sleep aid.