W.B.
Hi T.,
Well here are the 1st things I would check:
1) teething, see if she has some teeth coming in. My 15 month old just cut her 1 yr molars. Try giving her some of those Hylands Teething tablets and/or Motrin before going to bed. Also check in her mouth if she is cutting more teeth or cutting teeth her gums will be swollen and puffy.
2) Is she getting enough to eat. Try giving her a snack an hour before bedtime. And along with her eveing cup or bottle.
3) Is she cold or hot ? dress her with another layer if her room feels cold or take off a layer if her room feels hot. My daughter likes to sleep in a onesis t-shirt and a blanket sleeper.
You might try 1 or all of these at the sametime.