My tummy was like that for about the first 3-4 days until my doctor gave me a prescription for Nexium. Are you taking a PPI? (such as Nexium, Prilosec, or Prilosec OTC). Your tummy is still producing the same about of acid right now and it can burn and give you that starving feeling.
If you are already on a PPI, I can't help you, cause that it what fixed my "hunger pangs" early on! Still to this day, 9 months out, if I forget to take my PPI, I can feel it. I tend to want to eat more to fill up that "empty" feeling in my tummy. (So I don't forget it very often!!!)
I hope you get relief soon,
I am 5'4" tall