Insanity helpp!!

sammiecakes1

Hey everyone! I'm on week 3 of insanity and need help figuring out how many calories I should be eating? Before insanity I was eating 1200 a day. But I know that is too low for insanity. I'm 19, 5'2 and 116 pounds. I've lost a little weight but none off my stomach which is the the place I gain weight. So it scares me a little bit to eat more then 1200 a day. And so far I haven't lost one pound or an inch with Insanity. Help please?
&& Anyone out there eating dairy and gluten free and have any healthy snacks they recommend?
Thank you!