3 weeks post op and nothing...

Here is the deal...
I had my surgery 3 week ago, and in the first 1 week I lost 17 pounds.
Its been two more weeks and I havent lost pound, and almost feel as if I am gaining weight.
I dont know what else to do, im exercising everyday and eating between 500- 800 calories a day, and no carbs or sugar. 
I still have a week til I get my first fill, but im getting really frustrated....

Does anyone have any advice???

make sure you are getting in all your fluids...
I stalled a few weeks post op..didnt loose for about 4 weeks...but once I started going #2 regularly (TMI) the weight started coming off.

keep doing what you're doing, your body will adjust on its own time, be patient, I know its hard.

 There's not much logic to the weight loss that happens after surgery. The most likely reason is that you didn't actually lose 17 lbs of *fat* the first week - you probably lost 10 lbs of fat and 7 or so lbs of water. Since you're getting in your fluids now, you've probably put back that 7 lbs of water and have actually lost more fat in the past two weeks.

You're doing great - how long would have it taken you to lose that weight before surgery? Be patient :) 

 You might feel like you're gaining weight because you're still bloated and swollen from surgery. It took me about a month to not feel like a marshmellow. I was very swollen and my belly was the worst part. 
Be patient, it sounds like you're making the right decisions and they should pay off in good time.

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Throw away your scale. Don't worry about the numbers. You're only 3 weeks out. Worry about healing, getting your protein and fluids in.