Hatching eggs

My hatching eggs have arrived in the post  and I'm very excited about it! I can't get the incubator until Monday unfortunately due to a mix up. But I'm told that if i keep them between 13 and 18 degrees that they will be ok until then. The Eggs are tiny and white! A huge contrast between my warrens big brown eggs. I just hope we get mainly or all girls in our three whole eggs. If not I might look into no crow collars and showing before considering the more permanent and unfortunate solution to a rooster.