Nasty taste can be from bile. The refluxate may contain varying concentrations of acid, pepsin, gas, or contents of duodenal reflux (such as bile acid and pancreatic enzymes).
Does reflux occur after everything you eat or drink, or is there a possibility it is triggered by specific foods or groups of foods? If you have food triggers you should keep a food log with date, time and reactions. Some of us have specific food intolerances/sensitivities. We live just fine with our acid controlled by medication, but we have to avoid the food triggers that make the stomach heave it back up.