4 days is not enough time to know whether or not something is working. Give it at least a few weeks before worrying that you might need to do something different. Also, make sure you're eating enough b/c eating too few calories will hurt your weight loss efforts in the long run just as much as eating too many will.
Hang in there!
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford