I Have Been Having What Appears To Be Bubbles In

I have been having what appears to be bubbles in my stomach area; sometimes it feels like flutters at the top of the stomach area. Sometimes I also feel gassy but cannot get rid of it. This happened a few years ago and I was put on Prilosec for approx 1 month to jump-start my system as my dr told me. Then it went away. What else could it be???