I'm right there with you, sister!
My 27 mo used to be a champion sleeper. Now it's 2 or 3 hours until she finally goes to sleep with 2 and 3 nighttime wake ups. I have no idea what happened. It's about 10pm, I put her down at 715. She's just gone to sleep in the past 15 min after playing in her crib, one visit from daddy, one finding lost paci, and one diaper change (barely damp let alone in need of changing), and a cuddle......
I know she'll be up at 2 or 3.