Welcome Music Mom!
Don't let yourself get discouraged...keep at it.
I think Casey is spot on...eat as naturally as you can. Often processed food has hidden pitfalls, i.e. sodium or high sugar or carbohydrate content with lower calories...I try to stick with fruit, veggies, protein and lower carbs. It does work...keep us posted! My DH used the My Fitness App and really felt it worked for him.