If you're exercising a lot maybe it's just that you are getting fitter in the short term, eg reducing fat and increasing muscle, muscle is heavier than fat? Two weeks isn't that long either, not sure how much difference you'd get in that time?
Congratulations on the healthy eating, hope I can improve my diet that much eventually!
Maybe post what you typically eat in a day, I'm sure someone more knowledgeable than me can suggest improvements or let you know roughly how you are doing!