Am I eating too few calories???

Well I feel better. Thanks for all your responses!!!!  

I just finished my full liquids diet and tho I did not track all my calories, I knew I was taking in far less than 2000 a day and lost 10 pounds in 2 weeks.  I actually did not suffer at all in energy, in fact I had more of it because I was shedding weight. I felt pretty good considering.  You are pre-op and tho I don't know if yo are on liquids only or what but I don't see how a pre-op patient can exist on 5-800 calories a day.  Post op, yes.  Pre-op, it seems drastic but if your doctor said to do it, I would stick with it.  It is only a short time right?

your DH doesn't need to worry about your intake. If you are having weight loss surgery,you obviously have plenty of stored fat for your body to break down and use as fuel. Just like all the rest of us had.