I've been eating less than 1000 calories the past few days...?

The past few days I've only eating around 700-900 calories. For a while I was shoving my mouth with everything I could find but all the sudden I just haven't had the desire to eat much. Also, everything I've eaten has been very healthy (mostly fruit, healthy grains (gluten free), healthy fats (nuts, little bit of fresh cheese, lots of green/herbal teas) and I feel a lot better. I plan to start exercising more (used to run a ton, stopped a year ago due to lack of motivation)

I'm trying to cut down a few pounds by the 20th...I know this isn't a healthy way (no need to tell me) but I could I expect to lose anything?

Once I get back into the habit of exercising I'm going to build up my calorie intake that way I avoid completely rebounding