Thanks so much for your help. Our 18 mo was sleeping until between 7:00-7:30am almost consistently until about two weeks ago. She is now waking up at 5:50/6:00am, even though she is going to bed at the same time (7:30pm). She wakes up upset and crying, but will not go back to sleep.
She is also fussing more at bedtime. She actually *just* fell asleep (at ~8:05pm) after a solid 30+ minutes of fussing and crying when we put her down. We check on her and give her pats every ~10 minutes when we put her down if she is crying (if she's quietly fussing we see if she can work it out on her own).
I don't know what has caused this decrease in sleep! She is napping between 1.5-2hours during the day (from 1pm-2.30/3pm), and that's the same as before. She wakes up crying, and that's how it has always been. It could be her 2 year molars, but I don't see them coming in and it's been two weeks now.
Is this just our new normal? Or should I be doing something to get that extra 1-1.5 hours of sleep back?