I got acid reflux / gerd issues 3 months ago. I recommend that you see a GI and do exactly as he/she recommends including lifestyle changes. Don't try to overanalyze at the beginning. I know many people around me who take prilosec for short and long periods of time and absolutely fine. Most people fall under this category.
If the steps that the doctor recommends do not work then start on the journey to research. I am in this camp.