Counting cals, workout. Two weeks no loss

What is happening??!! Every time I've ever tried to lose weight I have tried everything and I never lose. The ONE time I lost 20lbs it wasn't intentionally, it was a bad time, was depressed, didn't eat much..boom 20 lbs down.
So now I went from eating Like crap and not working out at all, to counting calories and doing nutrisystem. I don't workout everyday but when I do it's not so much that I'm gaining muscle and that's why the scale hasn't changed. It's cardio, walking on the teadmill etc. I weigh myself in the am naked and still over two weeks and no change. What am I doing wrong???