I have been using a help of the nutritionist for 6 months, I have been struggling to loose 5 kg, and due to the fact that I had a bad knee injury - I could not exercise at all.
I was given a diet plan - which I was applying very carefully. I started exercising again, the plan has not been updated at all, I ended up with heavy constipation, continuous headaches... I gave up that plan, created the one on my own - started eating more, continued exercising - and lost 2kg within a month. I am happy with that - I see progress, I feel much better, and healthier. If you do not see the progress within 2 months - change the program (if you are really applying it precisely) - every one is unique, so the programs should be adjusted.