Im about 15 lbs over weight could this be the cause of my gerd.i also have gastritis but they did biopsies and those were normal.i eat healthy normall?

Overweight -possible: Yes being overweight is a risk factor for gerd. Only 15 lbs overweight is not that much, but still possible. More common would be stress, poor sleep, smoking, caffeine, and spicy food.

It contributes: There are many things that cause gastroesophageal reflux disease. Usually, there are multiple contributing factors such as diet and medications. Being overweight absolutely can contribute to the development of gerd. Losing weight may cure or alleviate your symptoms of heart burn.