Hey pink,
my daughter started sleeping the night at 6 and half weeks, my mom took her overnight and she came home to a full 8 hrs sleep, dont feel bad, if your kid was hungry she/he would wake up and demand food.
My daughter started waking up at night again, everytime they get sick/teeth/time change you have to get them back on a sleeping schedule right away it may be a few days of waking up but its better than nothing. My daughter is 15 months and I just found out about this sleep schedule thing, I hope it help and dont worry everything will be fine!!!!!!
Jess