Started ATKINS DIET and...?

i started the diet 8 days ago. as of day #5, i had lost 5 pound. the very next day i was UP two pounds- dropping my loss back to only 3 pounds. on day number 8, i am still stuck there. i did nothing different at all. is it normal that i gained two pounds back and am stuck there? have you done this diet, will i kick back in and loose more.