1. Failure is the probable result: most diets fail to help you lose weight or keep it off for any length of time. It is very likely that you'll regain the weight back - if you have managed to actually lose any. They fail for many reasons- mostly because you are human and diets are made for robots. What I mean is that humans (YOU!) were meant to eat good food, enjoy foods you love once in a while, eat with flexibility and eat with pleasure and occasionally for pleasure. Most diets take all of that away. They quiet your greatest internal food expert (hunger and fullness) and make you focus on an outside "expert" (a meal plan, forbidden foods, pills, etc).
3. There is a good change you may actually gain weight: not losing weight is a bummer. Gaining weight is an even bigger let down. This can be due to a few factors- they can lower your "metabolism" (slow down the amount of calories you burn), increase your appetite and preoccupation with food as well as disconnecting your from your hunger and fullness cues.