Want to see these numbers change!

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I started using this app 1 month ago. 40 lbs is how much I would like to lose. It gave me the 1250 calories to work with and I have been so good at sticking within that!! My main meals are chicken, fish, rice, egg whites, frozen grapes, occasional peanut butter/ rice cake. Cut out 90% of sugar! Drink only water now(with flavor drops), around 18 cups a day! It's easy to keep track in my water jug lol.

Also I have been going to the gym 5 days a week doing 50 min of various cardio and random arm leg belly exercises.

MY DILEMMA!!!! I've only lost 2 lbs

Help me understand what I'm doing wrong please!

Thanks in advance!
Casey