2 pounds in 5 days!

That is awesome! Keep up the great work!!!

At 1st you'll lose a lot of water weight, only calorie restriction'll cause fat loss. You'll also gain water weight via sodium in what you consume, menstruation, etc. So don't be alarmed by weight gains, that what your doing isn't working; for at least 28 days. If you don't see an expected total loss by then, reevaluate your goals. Also take measurements, sometimes you won't lose weight but you'll lose inches!