Help! We have had quite a good sleeping pattern with our DD. She is bottle fed and has been in a routine of feeding at around 6.30am, 10.30am, 1pm, 5pm, 8pm (all 6 oz feeds) and a last 4oz feed at 10-10.30pm. However she is now awaking at 5.30am for a feed and not properly going back to sleep after that. Any ideas?