are you eating sufficient fats and proteins?
1200 cals is VERY low, especially for an active person. and unless you're very small, even 1600 is pretty low.
making too many changes, especially such a dramatically small amount of cals, can make your body stubborn about losing weight. make one change and monitor how you feel for a week or two.
As I ate the oysters with their strong taste of the sea and their faint metallic taste that the cold white wine washed away, leaving only the sea taste and the succulent texture, and as I drank their cold liquid from each shell and washed it down with the crisp taste of the wine, I lost the empty feeling and began to be happy and to make plans.
– Ernest Hemingway