hey hun, im afraid at 16 days old its very normal for your little one not to be sleeping much, it will settle down but its going to take a while, my lil man was up every 2 hours when he was first born he started to sleep threw the night at 7 weeks old. you could try starting a routine but i think she may still be a bit young for that, maybe take her to the doctor just to double check shes ok e.g pooing etc etc, xx