It will happen! Some people lose slower than others. How do you feel at the end of the day? Sometimes when I've had a hard workout, I feel a lot thinner (even thought I haven't lost anything). That feeling alone keeps me going, even though I am not losing anything at all right now. I'm just happy to not be gaining! Keep going! You will see results soon. :) I know that after a few weeks of not losing, it can be very frustrating. Sometimes when I eat healthy and exercise for a certain period of time and nothing happens after losing for a while, the only way I can seem to kickstart it again is to have something fattening, like pizza or something from a fast food joint. For some reason that seems to work for me. I'm not advocating that you sabotage like I do sometimes (especially those two choices I know are bad!); what works for me may not work for you or anyone else. Like I said, it will happen!
Hang in there!