If you've been eating this way for 2 weeks, have you experienced any weight loss? As far as portion size is concerned, if you don't lose or gain, you're eating to maintain your weight. To lose, there has to be a deficit. If you haven't lose any weight, you might want to give it a few more weeks and then consider smaller portions if you are showing no loss at all.
Keep in mind that females will often show 2-5 lbs additional on the scale at the time of their periods, as the body retains some water in the process, so that's why the scale number can be deceiving at that time of the month.