I think MY leopard gecko is shedding?

or y is everything but his h ead white and how old are they when they 1st shed ive only had them a wk i think 1 is a fresh hatchi=ling she is very small and the 1 i think is shedding is about 3 1\2 to four in HELP PLEASE IM SCARED HELP ME ASAP I DONT WANT NOTHIN TO HAPPEN TO HIM