Hey Gingy! It would be best to consult a registered dietician, but in my experience you're not eating enough protein, nor are you eating enough calories. Your body is a machine and it needs gas to run! Even though we have a band around our bellies we need to make sure we have enough fuel to get us through the day. I'm also going to the low carb route, with my daily intake between 50-75g (more on days i have resistance training). I keep my fat low (under 30g) and my protein at least 100g. When trying to burn fat, your protein intake should be 10% of your calories. I eat 1000-1200 calories per day=100-120 grams of protein.
When you can begin exercising it will help tremendously. When I was immediately post op until 4 weeks, my physician said 60-80g/protein per day.
Just like someone else said.. we didn't put this weight on overnight, and we can't blink it off! Don't get frustrated you can do it!