Weight Not Coming Off

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I am new here and I have been using the app for about a month to keep track of my food and excercise. I have lost 30 lbs since the end of Feb doing Medifast but do to the cost and the affect it was having on my hormones I have stopped and started using the app. My goal is to lose 60 lbs. I am currently at 167 and I am 5'3". The past month, I have not lost a single pound. I am stuck. I am eating about 1200 calories per day and exercising 6 days a week doing the Rockin Body videos. Am I not eating enough and that is why I am not losing weight?