M.V.
My daughter did the same thing for awhile. Once I realized she was just whining, I would tell her to go to her room until she was done. I told her I didn't want to hear it and she could come out of her room when she was done. It usually lasted less than 5 minutes and she would come out of her room and say "I'm done!" I never made a big deal of her being "done" either. I would say "good, because I can't stand that whining." The whining went away after a couple of weeks. Good luck to you!