Sleep schedule HELP!!

Brittney

My girl is coming up on 17 months next week. Up until about a week ago, she was sleeping 7:00pm-6:30am every night. It was perfect. But lately, she is waking up earlier and earlier. This morning she woke up at 4:30am and has been wide awake since. How do I get her to sleep later? I tried pushing bedtime back but 15 mins after her normal bedtime, she gets so fussy and pulls at her crib. She knows when bed time is and never fights it.

**she does take one 1.5-2 hour nap every day.