Help!

kalwi

I'm supposted to take atleast 1,200 calories a day, BUT I can't really eat that much (taking around 1,000 calories).
I used to take atleast 1,500 calories a day, but since I starrted eating healtier and drinking ALOT of water I starrted eating less.
I'm just not hungry..
I don't feel tired or anything.

Do you guys have any advice for me? Tips or tricks?
Could it be dangerous for my health? -.-