Hungry One Day - Not Hungry The Next. How?

Ok, I am getting frustrated by this because I can't seem to find a pattern and correct what's happening. Lately I have been really hungry one day and then the next day I have to practically force myself to eat a few bites. I get the shakes before I even feel hungry.

Yesterday was a hungry day. It seemed like I was hungry every hour or so. I tried to just be hungry but my sleeve gets pi$$ed if it is empty for too long. It will double me over (I am on Nexium for the acid). I was able to eat half of a chicken breast plus peas and Edimame Beans (about 1/4 cup). An hour and a half later I was hungry and finished off the chicken. It was like this all day. If I were still tracking I would guess that I had roughly 1,200 calories yesterday easily.

Today, not so much. It is 12:30 pm and I have had the following: 1 hard boiled egg, 1 small (finger sized) strip of grilled chicken, and two baby spoons of spinach. I have been up since 4:30 this morning. I had to force myself to eat the egg and then the chicken and spinach. I'm just not hungry and a very small amount fills me up today.

Ok, so what the heck? Your sleeve capacity cannot change from day to day can it? How can I go to bed feeling hungry and wake up feeling full?

I thought that maybe it was a difference in Water intake. No, I never drink the amount I am supposed to. I am lucky if I finish a single 20 oz Powerade zero on any given day. My urine is almost clear so I guess I am getting enough fluids (I'm also almost never thirsty).

I thought it had something to do with whether or not I had a BM that day too. No again. I have one almost every day and still fluctuate my hunger.

Any ideas? It's miserable to be hungry all day long one day and anorexic feeling the next.

Shae