Why am I so hungry all the time post tummy tuck?

I am a 11 days post tummy tuck & walking around well. In the beginning, I was not that hungry & small that what I could actually eat was much smaller in portion. I know that it was from the ab tightening. However, in the past couple of days, I've become ravenous! I'm so hungry all the time. Prior to surgery, I ate upwards of 1800-2000 calories a day because of my training program (competitive athlete). I cannot eat that much right now when I'm not exercise. Will this pass? Soon?