E.F.
Teething? Molars throw my 2 year old off while sleeping. Bad dreams? Is something different about her room? (new night light, sheets, curtains, started turning the heat on at night - too hot or the sound bothers her?) Anxiety? Scared of the dog who lives next door? Sorry you're going through this and I hope you figure out what is bothering her and are able to resolve it quickly. Good luck!