Honestly man, as someone who suffered from severe acid reflux and heart burn for about 7 years earlier in my life...you have to change your diet, the times you eat and you have to lose weight. There are things that I love that I simply cannot eat anymore (without accepting that I'll have heart burn badly afterwards)...for instance, I absolutely love onions, but I can't make my body agree with them, regardless of my physical shape. Another that I have that really sucks is OJ...my doctor thought I had an ulcer, but after being checked, had none...OJ stills kills me at times, especially if I drink it late at night.
I got up to about 260lbs in my mid 20's, and then started really hitting the gym and running, and now I maintain around 220lbs (6'4 and have always been large framed). My acid reflux and heart burn almost all but went away when I started working out and eating better. Also, I never eat dinner after 9pm if I can help it, that has helped a lot as well.