Dizzy and weak on pre-op

Hey Guys,

I'm on my second week of pre-op diet. I'm on a very low calorie, low fat menu

ie) Small bowl Cereal for Breakfast. salad with 50g chicken, no dressing for lunch. Vegetables and 50g baked Beans for dinner.

I have been very hungry, but managed to keep myself occupied.

The thing which is worrying me more is that I honestly feel really lethargic, and even quite dizzy a lot of the time.

If this is down to lack of calorie intake, then surely it will only get worse after my op.

Is this something other people experienced, and does it go away once you get used to not eating so much?

Should I check with my surgeon? It sounds like blood sugar right?

Thanks xxx:bored0: