The control line is lighter but not the test line. Which indicates that your hcg levels are high and it's drawing dye from the control line. The first line you see is the line that tells you if your pregnant or not.
Gastroesophageal Reflux Disease (GERD) is caused by reflux of stomach acid into the esophagus. In most sufferers this is due to a relaxation of the lower esophageal sphincter (LES) that opens to allow food and liquids to pass into the stomach, and closes to prevent food and stomach acid from flowing back into the esophagus.
Gerd cough is caused due to acute viral upper respiratory tract infection and also due to smoking by individuals. Most of these types of cough would persist for a few days but certain cough would persist for months to years.