I hear you too.
Ivy is 13months old and she is a twenty minute cycle girl. It's frustrating and exhausting. Her twin brother sleeps all night, so I'm pretty sure it is just her and not something that I am doing.
I really feel for you. I'ts difficult when there seems to be nothing you can do to resettle either. Last night I was up from midnight until four am trying to get her to sleep but she just wanted to be awake.
I'm sure our little night owls will sort themselves out eventually, you just need time and lots of patience. Hugs to all the ladies with matchsticks holding their eyelids open. Hugs and just ONE good nights sleep.