Heartburn may save me from gaining too much! lol

So my appetite has been crazy, and I always feel hungry, but the last few weeks it has been very hard for me to eat anywhere near as much as I crave. This is due to the fact that anything I eat makes me feel like I swallowed lava and my chest burns for hours after. I still eat enough for the baby and me, but I feel like my heartburn may be inadvertently saving me from gaining excess weight. I feel like I would be much larger if I could eat as much as I really wanted without feeling of a hotpoker in my chest. lol I guess I found the silver lining of this horrible heartburn I know is only going to get worse until the baby gets here.